Engine Assembly-Cylinder Block & Related Parts fit your 2003 Chevrolet Trailblazer EXT 2WD

My Vehicle Change Vehicle

2003 Chevrolet Trailblazer EXT 2WD

4-Speed Automatic Transmission, 4L60-E, Electronic; Trailblazer 4 Door EXT

My Vehicle Change Vehicle

2003 Chevrolet Trailblazer EXT 2WD

4-Speed Automatic Transmission, 4L60-E, Electronic; Trailblazer 4 Door EXT

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Brakes, Rear Axle, Propeller Shaft, Wheels, Tires

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Cooling System, Grille, Oil System

Frames, Springs, Shocks, Bumpers

Front Axle, Front Suspension, Steering

Front End Sheet Metal, Heater

Fuel System, Exhaust, Emission System

Maintenance Parts, Fluids, Capacities, Electrical Connectors

Rear Body Structure, Moldings & Trim, Cargo Stowage

Starter, Generator, Ignition, Electrical, Lamps

Transmission - Automatic

Parts Questions

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Recommended

Part No. & Part Description

Price

Part No. &
Part Description

SEAL KIT, Engine Rear Main Bearing
89060436
SEAL KIT, CRANKSHAFT REAR OIL(PART OF 518)(REVERSE LIP SEAL,INCLUDE INSTRUCTION SHEET)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $34.84
$22.14
1
Add To Cart
89017621
SEAL KIT, CRANKSHAFT FRONT OIL(FOR USE W/ORIGINAL 2002-03 CRANKSHAFT-SMOOTH HUB BALANCER;2ND DESIGN (12578069)-BALANCER HAS A STEP-ON THE HUB USE W/89017622 SEAL KIT)
- Fitting Vehicle Options:
  ST1(LL8)
MSRP: $31.32
$19.91
1
Add To Cart

BOLT, Engine Main Bearing Cap
12560272
BOLT, CRANKSHAFT BEARING CAP(M10X2X102.5)
Fitting Vehicle Options:
ST1(LM4)
Require Quantity:
10
Package Quantity:
10
MSRP: $7.20
$4.57
10
Add To Cart
12556127
BOLT, CRANKSHAFT BEARING CAP(M8X1.25X24)
- Fitting Vehicle Options:
  ST1(LM4)
- Require Quantity:
  10
- Package Quantity:
  1
MSRP: $5.21
$3.31
1
Add To Cart
11569841
BOLT, CRANKSHAFT BEARING CAP(M10X133.5,48.5 THREAD,22.6 OUTSIDE DIAMETER,10.9)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  14
- Package Quantity:
  1
MSRP: $7.96
$5.06
1
Add To Cart

12677836
SENSOR, Engine Oil Pressure/Temperature, SENSOR,ENGINE OIL PRESSURE(MATING CONNECT W/LEADS USE 88988301)
MSRP: $99.14
$49.96
1
Add To Cart

12639249
GASKET, Engine Rear Main Bearing, GASKET,CRANKSHAFT REAR OIL SEAL HOUSING(PART OF 518)
MSRP: $58.58
$39.27
1
Add To Cart

BEARING KIT, Engine Connecting Rod
89017573
BEARING KIT, CONNECT ROD(STD)
Fitting Vehicle Options:
ST1(LM4)
Require Quantity:
08
Package Quantity:
1
MSRP: $24.00
$15.25
1
Add To Cart
89017791
BEARING KIT, CONNECT ROD(INCLUDES 108,109)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  06
- Package Quantity:
  1
MSRP: $26.79
$16.19
1
Add To Cart

PLUG, Engine Oil Distribution
12573460
PLUG, ENGINE BLOCK OIL GALLERY(INCLUDES 110)(15.68MM DIAMETER)(INCLUDES O-RING SEAL(N.S.S.)
Fitting Vehicle Options:
ST158(LM4)
MSRP: $11.09
$6.69
1
Add To Cart
11561430
PLUG, ENGINE BLOCK OIL GALLERY(M16X1.5X23,1010 STEEL,3044GMW.W/ALUMINUM WASHER,SEALANT)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  05
- Package Quantity:
  1
MSRP: $7.35
$4.67
1
Add To Cart
11588949
PLUG, M16X1.5X14, 24 OUTSIDE DIAMETER, SAE 1010 STEEL, GMW3044, W/ ALUMINUM WASHER(ENGINE BLOCK OIL GALLERY)(8.973)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $14.20
$9.02
1
Add To Cart
11588949
PLUG, M16X1.5X14, 24 OUTSIDE DIAMETER, SAE 1010 STEEL, GMW3044, W/ ALUMINUM WASHER(ENGINE BLOCK COOLANT DRAIN HOLE)(8.973)
MSRP: $14.20
$9.02
1
Add To Cart
11588949
PLUG, M16X1.5X14, 24 OUTSIDE DIAMETER, SAE 1010 STEEL, GMW3044, W/ ALUMINUM WASHER(ENGINE BLOCK OIL GALLERY)(8.973)
MSRP: $14.20
$9.02
1
Add To Cart

12556127
BOLT, Engine Camshaft gear, BOLT,CAMSHAFT SPROCKET(M8X1.25X24)(0.056)
- Require Quantity:
  03
- Package Quantity:
  1
MSRP: $5.21
$3.31
1
Add To Cart

BOLT, Engine Rear Main Bearing
12556127
BOLT, CRANKSHAFT REAR OIL SEAL HOUSING(PART OF 518)(M8X1.25X24)(0.056)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $5.21
$3.31
1
Add To Cart
12556127
BOLT, CRANKSHAFT REAR OIL SEAL HOUSING(PART OF 518)(M8X1.25X24)(0.056)
- Fitting Vehicle Options:
  S1(LM4,M30)
- Require Quantity:
  12
- Package Quantity:
  1
MSRP: $5.21
$3.31
1
Add To Cart

SEALANT, Maintenance Products

12378521
SEALANT, ROOM TEMPERATURE VULCANIZING ENGINE SILICONE 5.3OZ CART(CRANKSHAFT REAR OIL SEAL HOUSING)
MSRP: $23.51
$13.40
6
Add To Cart
19333512
SEALANT, THREAD(VIBRA-TITE 420)(1.69 OUNCE(OIL PAN AT FOUR CORNER)

12560273
STUD, Engine Main Bearing Cap, STUD,CRANKSHAFT BEARING CAP(HEX FLANGED HEAD,M10X2X23,M8X1.25X11,113.5 TOTAL LONG)
- Require Quantity:
  10
- Package Quantity:
  1
MSRP: $9.88
$6.42
1
Add To Cart

12589016
RETAINER, Engine Camshaft, RETAINER,CAMSHAFT(INCLUDES SEAL)(USE WITH BOLT 11561455)
MSRP: $33.44
$20.19
1
Add To Cart

BOLT, Engine Flywheel
11569956
BOLT, FLYWHEEL(M11X1.5X23.5)(W/SEALER)(HEXAGON HEAD STYLE BOLT)
Fitting Vehicle Options:
ST1(LM4)
Require Quantity:
06
Package Quantity:
10
MSRP: $5.85
$3.71
10
Add To Cart
12568933
BOLT, AUTOMATIC TRANSMISSION FLEXIBLE PLATE(M10X1.0X30MM)(FINE THREADS)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  08
- Package Quantity:
  1
MSRP: $6.08
$3.86

BOLT, Engine Crankshaft Pulley and Balancer
12557840
BOLT, CRANKSHAFT BALANCER(M16X2.0X103)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $8.37
$4.80
1
Add To Cart
11609792
BOLT, CRANKSHAFT BALANCER(HEXAGON HEAD WASHER, M16X2)
- Fitting Vehicle Options:
  ST1(LL8)

BEARING KIT, Engine Crankshaft Main
89017571
BEARING KIT, CRANKSHAFT(#1,2,4,5)(STD)
Fitting Vehicle Options:
ST1(LM4)
Require Quantity:
04
Package Quantity:
1
MSRP: $74.95
$47.63
1
Add To Cart
89017572
BEARING KIT, CRANKSHAFT THRUST(STD)(#3)
- Fitting Vehicle Options:
  ST1(LM4)
MSRP: $59.11
$35.71
1
Add To Cart
89060394
BEARING KIT, CRANKSHAFT(#1,2,3,4,6,7)(STD)(INCLUDES 119,121)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  06
- Package Quantity:
  1
MSRP: $53.97
$34.31
1
Add To Cart
89065022
BEARING KIT, CRANKSHAFT(#5)(INCLUDES 120)
- Fitting Vehicle Options:
  ST1(LL8)
MSRP: $51.24
$32.56
1
Add To Cart

PIN, Engine Cylinder Head
3522352
PIN, CYL HEAD LOCATING(HOLLOW DOWEL,15.675X28,CHAM BOTH ENDS,SAE 12L14,ZINC COATED (DIPPED OR PLATED))
Fitting Vehicle Options:
ST1(LL8)
Require Quantity:
02
Package Quantity:
1
MSRP: $17.91
$11.38
1
Add To Cart
12570326
PIN, CYL HEAD LOCATING
- Fitting Vehicle Options:
  ST1(LM4)
- Require Quantity:
  04
- Package Quantity:
  1
MSRP: $7.20
$4.57
1
Add To Cart

12635957
SWITCH, Engine Oil Pressure/Temperature, SWITCH,ENGINE OIL PRESSURE
MSRP: $89.49
$45.11
1
Add To Cart

55503649
HEATER, Engine Coolant Heater, HEATER,ENGINE COOLANT
MSRP: $61.22
$38.99

BOLT, Engine Connecting Rod Cap
12552947
BOLT, CONNECT ROD(PART OF 110,114)(MJ9X1.0-4H6HX61.9 LONG)
Fitting Vehicle Options:
ST1(LL8)
Require Quantity:
12
Package Quantity:
1
MSRP: $12.23
$7.77
1
Add To Cart
11610158
BOLT, CONNECT ROD(PART OF 105)(MJ9X1X43)
- Fitting Vehicle Options:
  ST1(LM4)
- Require Quantity:
  16
- Package Quantity:
  1
MSRP: $18.70
$11.30
1
Add To Cart

SPROCKET, Engine Crankshaft/Timing
12556582
SPROCKET, CRANKSHAFT
Fitting Vehicle Options:
ST1(LM4)
MSRP: $46.14
$27.88
1
Add To Cart
24100061
SPROCKET, CRANKSHAFT
- Fitting Vehicle Options:
  ST1(LL8)
MSRP: $124.30
$79.00
1
Add To Cart

12646386
CHAIN, Engine Timing, CHAIN,CAMSHAFT TIMING
MSRP: $91.23
$61.15
1
Add To Cart

SENSOR, Distributor (also Knock Sensor)
12560228
SENSOR, CRANKSHAFT POSITION(INCLUDES 702)(MATING CONNECT W/LEADS USE 88986451)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $114.40
$63.78
1
Add To Cart
12567446
SENSOR, KNOCK(MATES W/CONNECT 13580877)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $48.68
$25.81
1
Add To Cart
19420372
SENSOR, CAMSHAFT POSITION(INCLUDES 704)
- Fitting Vehicle Options:
  ST1(LM4)
- Replaced By:
  19420911
MSRP: $120.57
$58.07
1
Add To Cart
12567712
SENSOR, CRANKSHAFT POSITION(W/STRAIGHT CONNECT)
- Fitting Vehicle Options:
  ST1(LL8)
MSRP: $84.12
$40.51
1
Add To Cart

BEARING, Engine Camshaft & Balance Shaft Front
19260874
BEARING, CAMSHAFT(DIAMETER 2.353-2.354)(POSITIVE #1 & #5)(USED WITH ENGINE BLOCK CAM BORE DIAMETER OF 59.60 MM IN POSTIONS 1,5 .FOR 1ST DESIGN SEE 19167382)
Fitting Vehicle Options:
ST1(LM4)(2ND DES)
Require Quantity:
02
Package Quantity:
1
MSRP: $50.64
$30.59
1
Add To Cart
19260875
BEARING, CAMSHAFT(DIAMETER 2.334-2.335)(POSITIVE #2 & #4)(USED WITH ENGINE BLOCK CAM BORE DIAMETER OF 59.10 MM IN POSITIONS #1 ,4)(FOR 1ST DESIGN SEE 12453168)
- Fitting Vehicle Options:
  ST1(LM4)(2ND DES)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $50.64
$30.59
1
Add To Cart
19260875
BEARING, CAMSHAFT(DIAMETER 2.334-2.335)(POSITIVE #2 & #4)(USED WITH ENGINE BLOCK CAM BORE DIAMETER OF 59.10 MM IN POSITIONS #1 ,5)(FOR 2ND DESIGN SEE 89017466)
- Fitting Vehicle Options:
  ST1(LM4)(1ST DES)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $50.64
$30.59
1
Add To Cart
12453168
BEARING, CAMSHAFT(59.10 MM)(# 2,4)(USED WITH ENGINE BLOCK CAM BORE DIAMETER OF 58.85 MM IN POSITIONS 2,4)(FOR 2ND DESIGN SEE 12453167)
- Fitting Vehicle Options:
  ST1(LM4)(1ST DES)
- Require Quantity:
  02
- Package Quantity:
  1

12576407
SPROCKET, Engine Camshaft, SPROCKET,CAMSHAFT
MSRP: $58.31
$35.23
1
Add To Cart

BALANCER, Engine Crankshaft And Camshaft Balancer
19300488
BALANCER, CRANKSHAFT(0.666)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $156.29
$89.80
1
Add To Cart
12578069
BALANCER, CRANKSHAFT(INCLUDES 12578073 WASHER)(REQUIRES SEAL KIT 89017622)
- Fitting Vehicle Options:
  ST1(LL8)
MSRP: $186.33
$117.89

1997278
VALVE, Fuel Tank Evaporator/Purge Control, VALVE,EVAP EMISSION CANISTER PURGE SOLENOID(W/O BRACKET)(MATING CONNECT USE 13585860)
MSRP: $69.54
$36.85
1
Add To Cart

ROD, Engine Piston
12568734
ROD, CONNECT(INCLUDES 102,103)
Fitting Vehicle Options:
ST1(LM4)
Require Quantity:
08
Package Quantity:
1
12574879
ROD, CONNECT (MACHINING W/ CAP)(INCLUDES 106,107,111)(PART OF 114)
- Fitting Vehicle Options:
  ST1(LL8)
- Require Quantity:
  06
- Package Quantity:
  1
MSRP: $102.46
$65.13

12581717
SEAL, Engine Rear Main Bearing, SEAL,CRANKSHAFT REAR OIL(PART OF 509)

12567157
SPACER, Engine Front Cover, SPACER,ENGINE FRONT COVER BOLT
MSRP: $5.75
$3.66
1
Add To Cart

12554553
PIN, Engine Camshaft gear, PIN,CAMSHAFT SPROCKET LOCATING(1/4X5/8)
MSRP: $8.90
$5.66
1
Add To Cart

HOUSING, Engine Rear Main Bearing
12581714
HOUSING, CRANKSHAFT REAR OIL SEAL(INCLUDES 511)(INCLUDE SEAL)
Fitting Vehicle Options:
ST1(LL8)
MSRP: $103.98
$66.09
1
Add To Cart
12639250
HOUSING, CRANKSHAFT REAR OIL SEAL(INCLUDES 141,517,519)
- Fitting Vehicle Options:
  ST1(LM4)
MSRP: $97.14
$55.81
1
Add To Cart

PISTON, Engine Piston
12585784
PISTON, (W/CONNECT ROD)(STD)(INCLUDES 106,107,110-113,115-117)(W/CASTING 12579989)(INCLUDES ROD,PISTON,RINGS,RETAINER)
Fitting Vehicle Options:
ST1(LL8)
Require Quantity:
06
Package Quantity:
1
88894397
PISTON, (W/PINION)(EXCEPT:CONNECT ROD)(INCLUDES 106,109)(STD)
- Fitting Vehicle Options:
  ST1(LM4)
- Require Quantity:
  08
- Package Quantity:
  1
88894398
PISTON, (W/PINION)(EXCEPT:CONNECT ROD)(INCLUDES 106,109)(0.5MM OVERSIZE)
- Fitting Vehicle Options:
  ST1(LM4)
- Require Quantity:
  08
- Package Quantity:
  1

COVER, Engine Front Cover

12628565
COVER, ENGINE FRONT(W/OIL PMP)(INCLUDES SEAL(FRONT COVER),GEARS, PLUG AND RELIEF VALVE)(SEE GROUP 00.000 "OIL PUMP,PAN AND RELATED PARTS" FOR DETAILED ILLUSTRATED VIEW)(2ND DESIGN COVER FOR USE WITH FLAT SEAL AT OIL PUMP PICK-UP TUBE/SCREEN.MUST USE WITH 2ND DESIGN SCREEN P/N 12589061,HAVING FLAT SEAL.")
12628565
COVER, ENGINE FRONT(W/OIL PMP)(INCLUDES SEAL(FRONT COVER),GEARS, PLUG AND RELIEF VALVE)(SEE GROUP 00.000 "OIL PUMP,PAN AND RELATED PARTS" FOR DETAILED ILLUSTRATED VIEW)

CRANKSHAFT, Engine
88958866
CRANKSHAFT
Fitting Vehicle Options:
ST1(LL8)
MSRP: $309.56
$195.86
1
Add To Cart
12559357
CRANKSHAFT
- Fitting Vehicle Options:
  ST1(LM4)

12560967
CAMSHAFT, Engine, CAMSHAFT,ENGINE
MSRP: $740.85
$466.63
1
Add To Cart

PLATE, Engine Crankshaft
12654640
PLATE, AUTOMATIC TRANSMISSION FLEXIBLE(USE W/QTY 3 OF BOLT 24503068)
Fitting Vehicle Options:
ST1(LM4)
MSRP: $210.45
$120.92
1
Add To Cart
12576272
PLATE, AUTOMATIC TRANSMISSION FLEXIBLE
- Fitting Vehicle Options:
  ST1(LL8,M30)

RING KIT, Engine Piston
12670787
RING KIT, PISTON(STD)
Require Quantity:
08
Package Quantity:
1
MSRP: $69.10
$39.70
1
Add To Cart
12670788
RING KIT, PISTON(0.5MM OVERSIZE)
- Require Quantity:
  08
- Package Quantity:
  1
MSRP: $97.10
$61.72
1
Add To Cart

12561513
KEY, Engine Crankshaft Pulley and Balancer, KEY,CRANKSHAFT BALANCER(4.8MMX37.5MM)
MSRP: $7.19
$4.57
1
Add To Cart

FITTING, Heater

12567908
FITTING, HEATER OUTLET HOSE
19355770
FITTING, HEATER INLET HOSE

12569598
PIN, Engine Clutch Housing or Transmission, PIN,TRANS LOCATING
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $2.66
$1.69
1
Add To Cart

12585420
PIN, Engine Camshaft Gear, PIN,CRANKSHAFT SPROCKET LOCATING(LOCATED INSIDE BALANCER)
MSRP: $7.01
$4.46
1
Add To Cart

24577092
STIFFENER, Engine Main Bearing Cap, STIFFENER,CRANKSHAFT BEARING CAP
MSRP: $67.49
$42.89
1
Add To Cart

3525915
PIN, Engine Front Cover, PIN,ENGINE FRONT COVER LOCATING(DOWEL,5.99X17.25,CHAM BOTH ENDS,10.9)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $5.88
$3.74
1
Add To Cart

3525915
PIN, Engine Rear Main Bearing, PIN,CRANKSHAFT REAR OIL SEAL HOUSING LOCATING(DOWEL,5.99X17.25,CHAM BOTH ENDS,10.9)(0.206)
- Require Quantity:
  02
- Package Quantity:
  1
MSRP: $5.88
$3.74
1
Add To Cart

88984239
SLEEVE, Engine Cylinder case, SLEEVE,CYL(MACHINING)
- Require Quantity:
  06
- Package Quantity:
  1
MSRP: $37.04
$23.54
1
Add To Cart

12564353
STUD, Starter Motor, STUD,STARTER(UPPER)
MSRP: $8.25
$4.59

12573950
WASHER, Engine Crankshaft Pulley and Balancer, WASHER,CRANKSHAFT BALANCER(FRICTION TYPE WASHER)

11561026
BOLT, HEX FLANGED HEAD,THREAD,14.2 OUTSIDE DIAMETER,9.8,GMW3200,MACHINE,HEADER POINT(CRANKSHAFT REAR OIL SEAL HOUSING)
- Require Quantity:
  08
- Package Quantity:
  1
MSRP: $7.20
$4.57
1
Add To Cart

11515756
BOLT, HEX FLANGED HEAD, M8X1.25X20,17THD,18 O.D.,10.9,7114M(CAMSHAFT POSITION SENSOR)
MSRP: $7.31
$4.64
10
Add To Cart

11515756
BOLT, HEX FLANGED HEAD, M8X1.25X20,17THD,18 O.D.,10.9,7114M(BOLT,CRANKSHAFT POSITION SENSOR)
MSRP: $7.31
$4.64
10
Add To Cart

11515756
BOLT, HEX FLANGED HEAD, M8X1.25X20,17THD,18 O.D.,10.9,7114M(CAMSHAFT RETAINER)
- Require Quantity:
  04
- Package Quantity:
  10
MSRP: $7.31
$4.64
10
Add To Cart

1453658
PIN, DOWEL STRAIGHT 5/8 DIAMETER 1 3/16 LG(TRANS LOCATING)
- Require Quantity:
  02
- Package Quantity:
  1
- Replaced By:
  12720455
MSRP: $7.21
$4.57
1
Add To Cart

11517518
BOLT, HEX FLANGED HEAD,M6X1X20,17.9 THREAD,14.2 O.D.,9.8,TIN ZINC(EVAP EMISSION CANISTER PURGE SOLENOID VALVE BRACKET)
MSRP: --
$12.60
1
Add To Cart

9427693
PLUG, CUP 5/8, CORROSION RESISTANT STEEL(ENGINE BLOCK OIL GALLERY)(1.531)
MSRP: $7.20
$4.57
1
Add To Cart

11589241
BOLT, HEX FLANGED HEAD,M6X1X20,17.5 THREAD,14.2 O.D.,8.8, GMW3359(CRANKSHAFT POSITION SENSOR)
MSRP: $7.19
$4.57
1
Add To Cart

11611351
PLUG, HEXAGON, M28X1.25X13, 10.9 STEEL,GMW3044, INTAKE DRIVER W/THREAD SEAL(ENGINE COOLANT HEATER HOLE)
MSRP: $23.11
$14.68
1
Add To Cart

11611351
PLUG, HEXAGON, M28X1.25X13, 10.9 STEEL,GMW3044, INTAKE DRIVER W/THREAD SEAL(LEFT SIDE ONLY)
MSRP: $23.11
$14.68
1
Add To Cart

Genuine GM Parts, the Right Choice

GMPartsGiant.com offers the wholesale prices for genuine 2003 Chevrolet Trailblazer EXT 2WD parts. Parts like Engine Assembly-Cylinder Block & Related Parts are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.2L, 8 Cyl 5.3L. Model Code: 4 DOOR EXT.