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2003 Chevrolet Silverado 1500 2WD
-- Select Engine --
Engine Description RPO Code
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.
  • 6 Cyl 4.3L MFI, 90 DEG LU3
  • 8 Cyl 4.8L MFI LR4
  • 8 Cyl 5.3L Flexible Fuel, MFI L59
  • 8 Cyl 5.3L MFI LM7
  • 8 Cyl 5.7L CPI L31
  • 8 Cyl 6.0L MFI LQ4
  • 8 Cyl 6.6L Diesel Turbo, Direct Injection, HO,ISUZU DURAMAX LB7
  • 8 Cyl 8.1L L18
-- Select Transmission --
Transmission Description RPO Code
  • 4-Speed Automatic Transmission, 4L60-E, Electronic M30
  • 4-Speed Automatic Transmission, HMD, 4L80-E, Heavy Duty MN8
  • 4-Speed Automatic Transmission, THM-R2(4L80-E) MT1
  • 5-Speed Automatic Transmission, ALLISON, LCT 1000, Overdrive M74
  • 5-Speed Manual Transmission (GETRAG) MG5
  • 5-Speed Manual Transmission, NVG, Overdrive MW3
  • 5-Speed Manual Transmission, Tremec M96
  • 6-Speed Manual Transmission, ZF, Overdrive ML6
-- Select Model Code --
Model Code Description RPO Code
A GM Model Code can be found on both the Service Tag and Service Parts Identification Tag.
  • Avalanche 1/2 Ton CC15936
  • Avalanche 3/4 Ton CC25936
  • Silverado 1500 Crew Cab Long Box CC15743
  • Silverado 1500 Extended Cab Long Box CC15953
  • Silverado 1500 Extended Cab Standard Box CC15753
  • Silverado 1500 Regular Cab Long Box CC15903
  • Silverado 1500 Regular Cab Standard Box CC15703
  • Silverado 2500 Crew Cab Long Box CC25943
  • Silverado 2500 Crew Cab Standard Box CC25743
  • Silverado 2500 Extended Cab Long Box CC25953
  • Silverado 2500 Extended Cab Standard Box CC25753
  • Silverado 2500 Regular Cab CC25903
  • Silverado 3500 Crew Cab CC35943
  • Silverado 3500 Extended Cab CC35953
  • Suburban 1/2 Ton CC15906
  • Suburban 3/4 Ton CC25906
  • Tahoe 4 Door 1/2 Ton CC15706
Parts Question Guide

Parts found for 2003 Chevrolet Silverado 1500 2WD > Starter, Generator, Ignition, Electrical, Lamps > Wiring Harness/Auxiliary

Part No. Part Description Retail
BRACKET, Chassis/Body Marker/Hazard


HARNESS, Chassis Wiring Make Sure These Fit


Fitting Vehicle Options:
CK1(03-53)(LU3,MG5,5X7)(EXC 9L4), CK1(03-53)(LU3,MG5,5Y0)(EXC 9L4), CK1(03-53)(LU3,MG5,9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,MG5,MW3,5X7)(EXC 9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,MG5,MW3,5Y0)(EXC 9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,MG5,MW3,9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,ML6,5X7)(EXC 9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,ML6,5Y0)(EXC 9L4), CK1,2,3(LB7,LM7,LQ4,LR4,L18,L59,ML6,9L4), CK1,2,3(MG5,MW3,5X7)(EXC 5Y0,9L4), CK1,2,3(MG5,MW3,5Y0)(EXC 9L4), CK1,2,3(ML6,5X7)(EXC 5Y0,9L4), CK1,2,3(ML6,5Y0)(EXC 9L4)


Fitting Vehicle Options:
CK1(MG5,FW1,Z71), CK1(MG5,ZX3), CK1,2,3(MG5,MW3,TRW)(EXC 9L4), CK1,2,3(ML6,TRW)(EXC 9L4)


Fitting Vehicle Options:


Fitting Vehicle Options:


Fitting Vehicle Options:
CK1,2,3(5G4)(EXC 5Y0), CK1,2,3(5X7)(EXC TRW,5G4,5Y0), CK1,2,3(5Y0), CK1,2,3(TRW)(EXC 5G4,5Y0)


Fitting Vehicle Options:
CK1,2(06-36)(5G4)(EXC TRW), CK1,2(06-36)(TRW)


Fitting Vehicle Options:


Fitting Vehicle Options:
CK1,2,3(03)(5G4)(EXC TRW), CK1,2,3(03)(TRW)


Fitting Vehicle Options:
CK1,2,3(53)(5G4)(EXC TRW), CK1,2,3(53)(TRW)


Fitting Vehicle Options:
CK1,2(06-36)(MN8,MT1,M30,M32,JF4)(EXC 9L4)


Fitting Vehicle Options:
CK1(03-53)(LU3,M30,5X7)(EXC 9L4), CK1(03-53)(LU3,M30,5Y0)(EXC 9L4), CK1(03-53)(LU3,M30,9L4), CK1,2(06)(9L4), CK1,2,3(03-43-53)(LB7,LM7,LQ4,LR4,L18,L59,MT1,M30,M74,5X7)(EXC 9L4), CK1,2,3(03-43-53)(LB7,LM7,LQ4,LR4,L18,L59,MT1,M30,M74,5Y0)(EXC 9L4), CK1,2,3(03-43-53)(LB7,LM7,LQ4,LR4,L18,L59,MT1,M30,M74,9L4), CK1,2,3(MN8,MT1,M30,M74,5X7)(EXC 5Y0,9L4), CK1,2,3(MN8,MT1,M30,M74,5Y0)(EXC 9L4)


Fitting Vehicle Options:


Fitting Vehicle Options:
CK1(MT1,M30,FW1,Z71), CK1(MT1,M30,M32,ZX3), CK1,2,3(MN8,MT1,M30,M74,TRW)(EXC JF4,9L4), CK1,2,3(MN8,MT1,M30,M74,TRW)(EXC JF4,KL6,9L4)
HOUSING, Accessory Switch(Multi-Function) Make Sure These Fit


Fitting Vehicle Options:
CK2(KL6), CK360,364(03-53)(PTO), CK360,364(PTO)


Fitting Vehicle Options:
CK2(KL6), CK360,364(03-53)(PTO)
NUT, Hexagon


Replaced by:
RELAY, Chassis/Body Marker/Hazard Make Sure These Fit


Fitting Vehicle Options:
Replaced by:


Fitting Vehicle Options:
CK360,364(5Y0)(EXC NQZ)
Replaced by:


Fitting Vehicle Options:
Replaced by:
SWITCH, Chassis/Body Marker/Hazard


SWITCH, Stop Lamp Switch Make Sure These Fit


Fitting Vehicle Options:


Fitting Vehicle Options:
CK1,2,3(EXC JF4)
Standard Parts









Although General Motors no longer manufactures this part, we may still have stock or the ability to special order it.

To verify availability, please contact us. We will respond promptly.

There are multiple parts that fit your vehicle, select the one that best matches your needs, or select vehicle options to filter result.
Genuine GM Parts, the Right Choice offers the lowest prices for genuine 2003 Chevrolet Silverado 1500 2WD parts. Parts like Wiring Harness/Auxiliary are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 5.7L, 8 Cyl 6.0L, 8 Cyl 6.6L Diesel, 8 Cyl 8.1L. Model Code: 1/2 TON, 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3/4 TON, 3500 CREW CAB, 3500 EXTENDED CAB, 4 DOOR 1/2 TON.
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