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Service bulletins for the 1996 GMC W4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

16 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
1300890092023-12-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
17-NA-0732023-03-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
99066D2002-03-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME OWNERS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE ORHARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INUJECTOR (SCPI) POPPET VALVE(S). *TT
99066C2001-05-10. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. SOME VEHICLES MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT
99066C2001-03-21. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL. SOME OWNERS OF 1996 - 1999 S/T, M/L, C/K, G, P AND W4 TRUCKS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT
99066C2001-03-19. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL. SOME OWNERS OF 1996 - 1998 MODEL YEAR S/T, M/L, C/K, G, P AND W4 TRUCKS, THAT ARE REGISTERED IN CALIFORNIA, EQUIPPED WITH 4.3L, 5.0L OR 5.7L ENGINE, AND CALIFORNIA EMISSIONS, MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT
001482001-02-25. Service bulletin. UNKNOWN OR OTHER. SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE, OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). THE DEPOSIT BUILD-UP MAY CAUSE INJECTOR POPPETS TO STICK CLOSED. *TT
99066B2000-07-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME OWNERS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START. **MR
99066A2000-06-06. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. SOME VEHICLES MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT
99066A2000-04-10. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL. SOME VEHICLES THAT ARE REGISTERED IN CALIFORNIA, EQUIPPED WITH A 4.3L, 5.0L OR 5.7L ENGINE AND CALIFORNIA EMISSIONS, MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START. *TT
97061A1998-08-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. EXHIBITING A CONDITION IN WHICH THE CLOSED SYSTEM DESIGN OF THE CURRENT PCV SYSTEM MAY ALLOW ENGINE OIL TO ENTER THE INTAKE SYSTEM. *YC
97061A1998-06-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VEHICLES WITH DIESEL ENGINES MAY EXHIBIT A CONDITION IN WHICH THE CLOSED SYSTEM DESIGN OF THE CURRENT PCV SYSTEM MAY ALLOW ENGINE OIL TO ENTER THE INTAKE SYSTEM. *YC
7665041997-08-21. Service bulletin. ELECTRICAL SYSTEM:IGNITION:MODULE. MALFUNCTION INDICATOR LIGHT (MIL) ON, POOR DRIVEABILITY CONDITIONS (PERFORM FLASH CALIBRATION). *TW
7631011997-07-24. Service bulletin. STEERING:GEAR BOX (OTHER THAN RACK AND PINION). PREMATURE OUTSIDE EDGE WEAR ON RADIAL FRONT TIRES (RESET TOE IN). *TW
7671011997-07-24. Service bulletin. VEHICLE SPEED CONTROL. DELAYED UPSHIFT (ADJUST ACCELERATOR CABLE/TPS/KICKDOWN SWITCH). *TW
6663081997-06-27. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. REDUCED ENGINE PERFORMANCE (REPLACE FUEL TANK CAP). *TW

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.