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1988 GMC K1500
-- Select Engine --
  • L03 - ENGINE,5.0L(5.0H),V8(T.B.I.) 5.0H(L03)
  • L05 - ENGINE,5.7L,TBI 5.7K(L05)
  • L19 - ENGINE,7.4L(7.4N),V8(E.F.I.) 7.4N(L19)
  • L25 - ENGINE,(292T)292,C.I.D. L6 292T(L25)
  • L49 - ENGINE,6.5L(6.5P)V8 DIESEL 6.5P(L49)
  • L56 - ENGINE,DIESEL,8 CYL,6.5(6.5S)TURBO 6.5S(L56)
  • L65 - ENGINE,6.5L(6.5F),DIESEL,TURBO HIGH OUTPUT 6.5F(L65)
  • LB4 - ENGINE,(4.3Z),V6,EFI 4.3Z(LB4)
  • LE8 - ENGINE,7.4L-W, V8, 454CID, 4 BBL. 7.4-W(LE8)
  • LH6 - ENGINE,6.2L(6.2C),DIESEL V8 6.2-C(LH6)
  • LL4 - ENGINE,6.2L(6.2J),DIESEL V8 6.2J(LL4)
  • LT9 - ENGINE,350,V8 (GASOLINE) 350(LT9)
  • LU2 - ENGINE,4.3B(4.3B),V6 HI-OUTPUT 4.3B(LU2)
  • Skip (If not sure)
 
×
The drop down menu includes engine codes with descriptions and engine sizes. Please use the following tutorial to locate the actual engine size of your vehicle; it could help you make the correct selection.
-- Select Transmission --
  • M20 - TRANSMISSION,MANUAL 4-SPEED(MUNCIE) 4-SPD M/TRANS(M20)
  • M30 - TRANSMISSION,AUTOMATIC 4 SPEED,4L60E,ELECTRONIC 4-SPD AUTO TRANS(M30)
  • M40 - TRANSMISSION,AUTOMATIC 3-SPEED(THM400-475/3L80) 3-SPD AUTO TRANS(M40)
  • MD8 - TRANSMISSION,AUTOMATIC 4-SPEED(THM700R4/4L60) 4-SPD AUTO TRANS(MD8)
  • MG2 - TRANSMISSION,MANUAL 5-SPEED(MUNCIE) 5-SPD M/TRANS(MG2)
  • MG5 - TRANSMISSION,MANUAL 5-SPEED(GETRAG) GETRAG 5-SPD M/TRANS(MG5)
  • MT1 - TRANSMISSION,AUTO,4-SPD,THM-R2(4L80-E) 4-SPD AUTO TRANS(MT1)
  • MT8 - TRANSMISSION,MANUAL,5-SPD,NEW PROCESS 5-SPD M/TRANS(MT8)
  • MW3 - TRANSMISSION,MANUAL,5 SPEED,NEW VENTURE GEAR,109MM,5.61 1ST,O/D 5-SPD M/TRANS(MW3)
  • MY2 - TRANSMISSION,MANUAL 5-SPEED 5-SPD M/TRANS(MY2)
  • MY6 - TRANSMISSION,MANUAL 4-SPEED(NEW PROCESS) 4-SPD M/TRANS(MY6)
  • Skip (If not sure)
-- Select Model Code --
  • TK10703 - P/UP K1500 REG CAB STD BOX
  • TK10903 - P/UP K1500 REG CAB LG BOX
  • TK10953 - P/UP K1500 EXT CAB LG BOX
  • TK20903 - P/UP K2500 REG CAB
  • TK20953 - P/UP K2500 EXT CAB LG BOX
  • TK30903 - P/UP K3500 REG CAB
  • TK30953 - P/UP K3500 EXT CAB
  • TK31003 - P/UP K3500 CAB CHAS 135.5
  • TK31403 - P/UP K3500 CAB CHAS 159.9
  • Skip (If not sure)
 
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A GM Model Code can be found on both the Service Tag and Service Parts Identification Tag.
 
Using VIN for most accurate result, in some cases the only way to get the parts that fit.
Categories
  • Body Mounting, Air Conditioning, Audio/Entertainment
        • Brakes
              • Brakes, Rear Axle, Propeller Shaft, Wheels
                    • Cab And Body Parts, Wipers, Mirrors, Doors, Trim, Seat Belts
                          • Cooling System, Grille, Oil System
                                • Engine
                                      • Frames, Springs, Shocks, Bumpers
                                            • Front Axle, Front Suspension, Steering
                                                  • Front End Sheet Metal, Heater, Vehicle Maintenance
                                                        • Fuel System, Exhaust, Emission System
                                                              • Normal Maintenance Parts, Fluids, Capacities, Electrical Connectors
                                                                    • Rear Body Structure, Moldings & Trim, Cargo Stowage
                                                                          • Starter, Generator, Ignition, Electrical, Lamps
                                                                                • Transfer Case
                                                                                      • Transmission - Automatic
                                                                                            • Transmission - Manual

                                                                                                  Parts found for 1988 GMC K1500 > Front Axle, Front Suspension, Steering > Differential Carrier/Front Axle

                                                                                                  Part No. Description Fitting Vehicle
                                                                                                       Options
                                                                                                  Req
                                                                                                  Qty.
                                                                                                  Retail
                                                                                                  Price
                                                                                                  Your
                                                                                                  Price
                                                                                                  Qty.    Cart
                                                                                                  Collapse ACTUATOR, Front Drive Axle Shifter/Lock
                                                                                                  26013495

                                                                                                  ACTUATOR, FRT AXLE SHIFT

                                                                                                  $235.05 $154.56
                                                                                                  Collapse ADJUSTER, Differential Bearing Adjusting
                                                                                                  26009676

                                                                                                  ADJUSTER,FRT DIFF BRG

                                                                                                  -- -- Discontinued
                                                                                                  26025619

                                                                                                  ADJUSTER,FRT DIFF BRG)(INCLS 22,23

                                                                                                  -- -- Discontinued
                                                                                                  Collapse AXLE, Front Axle and Axle Center
                                                                                                  26043586

                                                                                                  AXLE,FRT(3.42 RATIO)

                                                                                                  -- -- Discontinued
                                                                                                  26043583

                                                                                                  AXLE,FRT(STMPD ZLS, REPLS ZBK,ZGS,ZKS)(GU6)

                                                                                                  -- -- Discontinued
                                                                                                  Collapse BEARING, Differential Side Gear
                                                                                                  11505123

                                                                                                  BEARING, DIFF

                                                                                                  $111.04 $62.10
                                                                                                  9411785

                                                                                                  BEARING, DIFF (2 REQD)(2)

                                                                                                  02 $39.40 $22.04
                                                                                                  9421004

                                                                                                  BEARING, DIFF CARR

                                                                                                  $26.65 $17.50
                                                                                                  9421004

                                                                                                  BEARING, DIFF CARR(C5Z)(EXC C6P)

                                                                                                  $26.65 $17.50
                                                                                                  9420095

                                                                                                  BEARING, DIFF SIDE

                                                                                                  Replaced by: 20997053

                                                                                                  $54.42 $30.44
                                                                                                  12334861

                                                                                                  BEARING, FRT WHL DRV SHF

                                                                                                  $37.67 $24.78
                                                                                                  Collapse BEARING, Drive Pinion Rear and Intermediate
                                                                                                  26053758

                                                                                                  BEARING, PINION GEAR RR

                                                                                                  Replaced by: 15286375

                                                                                                  $85.40 $47.76
                                                                                                  Collapse BEARING, Front Axle
                                                                                                  26029615

                                                                                                  BEARING, DIFF OUTPUT SHAFT NEEDLE

                                                                                                  $20.40 $11.77
                                                                                                  9411785

                                                                                                  BEARING, FRT DRV AXLE INR SHF

                                                                                                  $39.40 $22.04
                                                                                                  Collapse BEARING, Pinion Shaft Front
                                                                                                  457108

                                                                                                  BEARING, PINION GEAR FRT

                                                                                                  $110.86 $62.00
                                                                                                  9413427

                                                                                                  BEARING, PINION GEAR FRT

                                                                                                  $77.16 $44.49
                                                                                                  9417781

                                                                                                  BEARING, PINION GEAR RR

                                                                                                  $74.72 $41.79
                                                                                                  Collapse BOLT, Differential Carrier
                                                                                                  26025087

                                                                                                  BOLT, DIFF CARR (M10 X 1.5 X 55)

                                                                                                  $4.57 $3.00
                                                                                                  26025087

                                                                                                  BOLT, DIFF CARR (M10X1.5X55)

                                                                                                  $4.57 $3.00
                                                                                                  Collapse BOLT, Front Axle
                                                                                                  26036835

                                                                                                  BOLT, FRT AXLE TUBE

                                                                                                  $8.39 $5.53
                                                                                                  Collapse BOLT, Pinion Diff Shaft Lock
                                                                                                  12337979

                                                                                                  BOLT, DIFF PINION GEAR

                                                                                                  $10.72 $7.05
                                                                                                  Collapse BOLT, Ring Gear
                                                                                                  12479028

                                                                                                  BOLT, HYP DR GR

                                                                                                  Replaced by: 11610549

                                                                                                  $3.88 $2.56
                                                                                                  14012703

                                                                                                  BOLT, HYP DR GR

                                                                                                  $4.73 $3.09
                                                                                                  Collapse BUSHING, Differential Carrier
                                                                                                  15962663

                                                                                                  BUSHING, DIFF CARR

                                                                                                  $17.03 $11.20
                                                                                                  15962664

                                                                                                  BUSHING, DIFF CARR

                                                                                                  $17.73 $11.66
                                                                                                  Collapse CARRIER, Differential
                                                                                                  19121737

                                                                                                  CARRIER, DIFF

                                                                                                  Replaced by: 15911670

                                                                                                  $968.54 $636.88
                                                                                                  Collapse CASE, Front/Rear Differential and Planet
                                                                                                  15801501

                                                                                                  CASE, DIFF

                                                                                                  $396.18 $260.52
                                                                                                  14038087

                                                                                                  CASE, W/THRUST WA, DIFF (LESS INT GEARS)

                                                                                                  $685.60 $450.83
                                                                                                  Collapse CLIP, Front Drive Axle Shifter/Lock
                                                                                                  15552871

                                                                                                  CLIP, DIFF SHFT ACTR SW

                                                                                                  -- -- Discontinued
                                                                                                  15552871

                                                                                                  CLIP, DIFF SHIFT ACTR SW

                                                                                                  -- -- Discontinued
                                                                                                  Collapse CONNECTOR, Front Axle and Axle Center
                                                                                                  12479390

                                                                                                  CONNECTOR, W/PLUG,FRT AXLE VENT HOSE

                                                                                                  $34.04 $22.39
                                                                                                  Collapse DEFLECTOR, Front Axle
                                                                                                  15588363

                                                                                                  DEFLECTOR, DIFF SHAFT

                                                                                                  $8.70 $5.72
                                                                                                  Collapse DEFLECTOR, Propeller Shaft Pinion
                                                                                                  15588337

                                                                                                  DEFLECTOR, PROP SHAFT PINION GEAR FLANGE

                                                                                                  $8.20 $5.39
                                                                                                  Collapse FORK, Front Drive Axle Shifter/Lock
                                                                                                  12479213

                                                                                                  FORK, FRT AXLE DIFF SHIFTER

                                                                                                  $47.26 $31.08
                                                                                                  Collapse GASKET, Front Axle and Axle Center
                                                                                                  15588383

                                                                                                  GASKET, FRT AXLE DRAIN PLUG

                                                                                                  $6.45 $4.25
                                                                                                  Collapse GEAR KIT, Differential Side With Pinion
                                                                                                  12471400

                                                                                                  GEAR KIT, FRONT DIFF SIDE & PINION FRONT AXLE (INCL ITEMS #28,31,33,34)

                                                                                                  $423.55 $278.50
                                                                                                  Collapse GEAR KIT, Ring and Pinion(Not Sold Separately)
                                                                                                  12471285

                                                                                                  GEAR KIT, RING & PINION

                                                                                                  -- -- Discontinued
                                                                                                  88963591

                                                                                                  GEAR KIT, RING & PINION

                                                                                                  Replaced by: 19257736

                                                                                                  $466.40 $306.68
                                                                                                  88963591

                                                                                                  GEAR KIT, RING & PINION (3.42R)

                                                                                                  Replaced by: 19257736

                                                                                                  $466.40 $306.68
                                                                                                  88963589

                                                                                                  GEAR KIT, RING & PINION (3.73R)

                                                                                                  Replaced by: 19257737

                                                                                                  $883.83 $581.17
                                                                                                  88963587

                                                                                                  GEAR KIT, RING & PINION (4.10R)

                                                                                                  $764.66 $502.81
                                                                                                  Collapse GEAR, Differential Side
                                                                                                  14012696

                                                                                                  GEAR, DIFF SI

                                                                                                  -- -- Discontinued
                                                                                                  Collapse LOCK, Differential Bearing Adjusting
                                                                                                  15588312

                                                                                                  LOCK, DIFF BRG ADJ

                                                                                                  $1.53 $1.00
                                                                                                  15521875

                                                                                                  LOCK, DIFF CARR BRG ADJ

                                                                                                  $8.39 $5.53
                                                                                                  26008812

                                                                                                  LOCK, DIFF CARR BRG ADJ

                                                                                                  $4.73 $3.09
                                                                                                  Collapse NUT, Propeller Shaft Pinion Flange
                                                                                                  88891763

                                                                                                  NUT, PROP SHAFT PINION GEAR FLANGE

                                                                                                  $5.41 $3.55
                                                                                                  Collapse PIN, Differential Carrier
                                                                                                  360570

                                                                                                  PIN, DIFF CARR ALIGNMENT

                                                                                                  $4.34 $2.85
                                                                                                  Collapse PLUG, Front Axle and Axle Center
                                                                                                  8672354

                                                                                                  PLUG, DIFF CARR

                                                                                                  $22.97 $15.10
                                                                                                  8672354

                                                                                                  PLUG, DIFF CARR FILLER

                                                                                                  $22.97 $15.10
                                                                                                  Collapse PLUG, Rear & Frt Axle Oil Plug
                                                                                                  15588374

                                                                                                  PLUG, FRT AXLE DRAIN

                                                                                                  $15.69 $10.31
                                                                                                  Collapse RING, Front Axle
                                                                                                  15521878

                                                                                                  RING, DIFF OUTPUT SHAFT RETAINING-LH

                                                                                                  $1.81 $1.19
                                                                                                  26031703

                                                                                                  RING, DIFF OUTPUT SHAFT RETAINING-RH("26031703 (RING) IS ONLY A SERVICE PT FOR VEH.THAT WERE RETROFITTED.IF VEH. STILL HAS OE EQIP. MUST USE 26031836.

                                                                                                  $8.72 $5.73
                                                                                                  15588354

                                                                                                  RING, DIFF SI GEAR

                                                                                                  $2.00 $1.32
                                                                                                  Collapse SEAL, Differential Drive Pinion Shaft Bearing
                                                                                                  15530288

                                                                                                  SEAL, PROP SHAFT PINION GEAR FLANGE OIL

                                                                                                  $10.75 $7.07
                                                                                                  Collapse SEAL, Front Axle
                                                                                                  26031569

                                                                                                  SEAL, DIFF OUTPUT SHAFT

                                                                                                  $18.67 $12.27
                                                                                                  15521874

                                                                                                  SEAL,FRT DRV AXLE INR SHF

                                                                                                  $27.05 $17.79
                                                                                                  Collapse SHAFT KIT, Front Axle
                                                                                                  26031836

                                                                                                  SHAFT KIT,FRT DRV AXLE INR(RH)

                                                                                                  Location: Passenger Side

                                                                                                  $349.62 $229.90
                                                                                                  Collapse SHAFT, Differential Locking
                                                                                                  14012700

                                                                                                  SHAFT, DIFF PINION GEAR

                                                                                                  $40.52 $26.65
                                                                                                  26056109

                                                                                                  SHAFT, DIFF PINION GEAR

                                                                                                  Replaced by: 25824249

                                                                                                  $40.52 $26.65
                                                                                                  Collapse SHAFT, Front Axle
                                                                                                  26006822

                                                                                                  SHAFT, DIFF OUTPUT (RH)

                                                                                                  $479.90 $315.56
                                                                                                  19121908

                                                                                                  SHAFT, DIFF OUTPUT INTER

                                                                                                  $260.15 $171.07
                                                                                                  19121909

                                                                                                  SHAFT, DIFF OUTPUT INTER

                                                                                                  $260.75 $171.46
                                                                                                  Collapse SHAFT, Front Drive Axle Shifter/Lock
                                                                                                  26033975

                                                                                                  SHAFT, FRT AXLE DIFF SHIFTER

                                                                                                  $36.98 $24.32
                                                                                                  Collapse SHIM KIT, Differential Rear Pinion Bearing
                                                                                                  14038012

                                                                                                  SHIM KIT, PIN GR BRG (.7366-.8382MM)

                                                                                                  $14.75 $9.71
                                                                                                  Collapse SHIM, Front Axle
                                                                                                  15522140

                                                                                                  SHIM, INR SHAFT TO CONN (1.80MM)

                                                                                                  $4.52 $2.95
                                                                                                  15588376

                                                                                                  SHIM, INTER SHAFT TO CONN (1.27MM)

                                                                                                  $4.73 $3.09
                                                                                                  Collapse SLEEVE, Front Axle
                                                                                                  12479006

                                                                                                  SLEEVE, DIFF CONN GEAR

                                                                                                  $88.32 $58.07
                                                                                                  26033974

                                                                                                  SLEEVE,FRT DRV AXLE CLUF/AXL

                                                                                                  $115.71 $76.09
                                                                                                  Collapse SPACER, Differential Rear Pinion Bearing
                                                                                                  12479162

                                                                                                  SPACER, PINION GEAR BRG

                                                                                                  $15.10 $9.93
                                                                                                  14012691

                                                                                                  SPACER, PINION GEAR BRG(.64")

                                                                                                  $12.22 $8.04
                                                                                                  Collapse SPACER, Front Axle
                                                                                                  15562346

                                                                                                  SPACER, DIFF SI GEAR

                                                                                                  $4.52 $2.95
                                                                                                  Collapse SPRING, Front Drive Axle Shifter/Lock
                                                                                                  15588371

                                                                                                  SPRING, DIFF SHIFT FORK RETURN

                                                                                                  $8.60 $5.65
                                                                                                  26013505

                                                                                                  SPRING, DIFF SHIFTER FORK DAMPER

                                                                                                  -- -- Discontinued
                                                                                                  Collapse SWITCH, Transfer Case Shift Control
                                                                                                  15638264

                                                                                                  SWITCH, ENGAGEMENT

                                                                                                  $40.83 $26.84
                                                                                                  15552842

                                                                                                  SWITCH,FOUR WHL DRV IND

                                                                                                  $32.49 $21.36
                                                                                                  Collapse VENT, Rear Axle
                                                                                                  15771000

                                                                                                  VENT, FRONT AXLE

                                                                                                  Replaced by: 25892279

                                                                                                  $3.04 $1.94
                                                                                                  Collapse VENT, Transfer Case
                                                                                                  15771000

                                                                                                  VENT, TRANSFER CASE

                                                                                                  Replaced by: 25892279

                                                                                                  $3.04 $1.94
                                                                                                  Collapse WASHER, Differential Pinion Thrust
                                                                                                  14012699

                                                                                                  WASHER, DIFF PINION GEAR THRUST

                                                                                                  $11.88 $7.82
                                                                                                  15588350

                                                                                                  WASHER, DIFF PINION GEAR THRUST

                                                                                                  $1.09 $0.72
                                                                                                  Collapse WASHER, Differential Side Gear Thrust
                                                                                                  12337937

                                                                                                  WASHER, DIFF SI GR THRUST

                                                                                                  $3.00 $1.97
                                                                                                  15588351

                                                                                                  WASHER, DIFF SIDE GEAR THRUST

                                                                                                  $4.43 $2.91
                                                                                                  Collapse WASHER, Front Drive Axle Shifter/Lock
                                                                                                  15588360

                                                                                                  WASHER, DIFF OUTPUT SHAFT THRUST

                                                                                                  $8.55 $5.63
                                                                                                  25931932

                                                                                                  WASHER, DIFF OUTPUT SHAFT THRUST (W/TABS)

                                                                                                  $4.06 $2.68
                                                                                                  25931932

                                                                                                  WASHER,FRT DRV AXLE CLU GR THR

                                                                                                  $4.06 $2.68
                                                                                                  Collapse WASHER, Propeller Shaft Pinion Flange
                                                                                                  517900

                                                                                                  WASHER, PROP SHAFT PINION GEAR FLANGE

                                                                                                  $5.99 $3.93
                                                                                                  Collapse YOKE, Propeller Shaft Pinion
                                                                                                  88967027

                                                                                                  YOKE, W/DEFL,PROP SHAFT PINION GEAR

                                                                                                  $78.28 $51.49
                                                                                                  26016668

                                                                                                  YOKE, W/DEFLECTOR, DIFF DRIVE PINION GEAR

                                                                                                  $106.51 $70.04
                                                                                                  Collapse Standard Parts
                                                                                                  11503865

                                                                                                  BOLT, HFH (M6X1X14)

                                                                                                  $7.25 $4.76
                                                                                                  14042602

                                                                                                  GASKET,(AR)(6.008)

                                                                                                  AR $8.54 $5.62
                                                                                                  9439550

                                                                                                  HOSE, (5/16" ID)

                                                                                                  -- -- Discontinued
                                                                                                  9439550

                                                                                                  HOSE, BULK (5/16 ID)

                                                                                                  -- -- Discontinued
                                                                                                  9428890

                                                                                                  PIN, SPRING TYPE S HOLE ( DIA-1/4,LGTH)(1 3/4,STEEL PL)(*KIT1)

                                                                                                  $3.65 $2.40
                                                                                                  9420445

                                                                                                  SCREW, HWH (10-16X.24)

                                                                                                  -- -- Discontinued
                                                                                                  Collapse Other Parts
                                                                                                  15742404

                                                                                                  AXLE,FRT(3.73 RATIO)(STMPD ZLT, REPLS ZBL,ZGT,ZKT)(GT4)

                                                                                                  -- -- Discontinued
                                                                                                  15742405

                                                                                                  AXLE,FRT(3.73 RATIO)(STMPD ZLX, REPLS ZCR,ZG6,ZHX,ZKX)(GT4)

                                                                                                  -- -- Discontinued
                                                                                                  26043585

                                                                                                  AXLE,FRT(STAMPED ZGU)(GT5)

                                                                                                  -- -- Discontinued
                                                                                                  26043589

                                                                                                  AXLE,FRT(STMPD ZHZ)(HC4)

                                                                                                  -- -- Discontinued
                                                                                                  15742406

                                                                                                  AXLE,FRT(STMPD ZLY, REPLS ZCY,ZGY,ZHY)(GT5)

                                                                                                  -- -- Discontinued
                                                                                                  15572988

                                                                                                  CARRIER, DIFF

                                                                                                  -- -- Discontinued
                                                                                                  14012698

                                                                                                  GEAR, DIFF

                                                                                                  -- -- Discontinued
                                                                                                  15588355

                                                                                                  GEAR, FRT DRV AXLE CLU

                                                                                                  -- -- Discontinued
                                                                                                  26033237

                                                                                                  HOUSING, FRT DRV AXLE INR SHAFT

                                                                                                  -- -- Discontinued
                                                                                                  26033235

                                                                                                  HOUSING, FRT DRV AXLE INR SHF

                                                                                                  -- -- Discontinued
                                                                                                  15530295

                                                                                                  NUT, DIFF CARR BRG ADJ

                                                                                                  -- -- Discontinued
                                                                                                  15521872

                                                                                                  RING, DIFF CARR BRG ADJ SEAL

                                                                                                  $8.55 $5.63
                                                                                                  26013506

                                                                                                  RING, DIFF SHIFTER SHAFT

                                                                                                  -- -- Discontinued
                                                                                                  26006824

                                                                                                  SHAFT, DIFF OUTPUT (LH)

                                                                                                  -- -- Discontinued
                                                                                                  26009627

                                                                                                  SHAFT, DIFF OUTPUT (LH)

                                                                                                  -- -- Discontinued
                                                                                                  26045210

                                                                                                  SLEEVE, DIFF CARR BRG ADJ

                                                                                                  -- -- Discontinued
                                                                                                  Genuine GM Parts, the Right Choice
                                                                                                  GMPartsGiant.com offers the lowest prices for genuine 1988 GMC K1500 parts. Parts like Differential Carrier/Front Axle are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl, 6 Cyl 4.3L, 6 Cyl 4.8L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel, 8 Cyl 7.4L. Model Code: 1500 EXTENDED CAB LONG BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 REGULAR CAB, 3500 CAB CHASSIS 135.5, 3500 CAB CHASSIS 159.9, 3500 EXTENDED CAB, 3500 REGULAR CAB.