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Technical Service Bulletins of the 1996 GMC W4

There have been 14 technical service bulletins issued for the 1996 GMC W4.

1 1996 GMC W4 gasoline engine TSB (Bulletin 99066D)

Bulletin Date:	Dec. 1, 2001
Component:	Gasoline engine.
Bulletin Summary:	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).
Vehicles covered in this TSB:	1999 Cadillac C Series, 2000 Cadillac C Series, 2000 Cadillac C/k Series, 1999 Cadillac K Series, 2000 Cadillac K Series, 1996 Chevrolet C Series, 1997 Chevrolet C Series, 1998 Chevrolet C Series, 1999 Chevrolet C Series, 2000 Chevrolet C Series, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 2000 Chevrolet G Series, 1996 Chevrolet K Series, 1997 Chevrolet K Series, 1998 Chevrolet K Series, 1999 Chevrolet K Series, 2000 Chevrolet K Series, 1996 Chevrolet L Series, 1997 Chevrolet L Series, 1998 Chevrolet L Series, 1999 Chevrolet L Series, 2000 Chevrolet L Series, 1996 Chevrolet M, 1997 Chevrolet M, 1998 Chevrolet M, 1999 Chevrolet M, 2000 Chevrolet M, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1996 Chevrolet S Series, 1997 Chevrolet S Series, 1998 Chevrolet S Series, 1999 Chevrolet S Series, 2000 Chevrolet S Series, 1996 Chevrolet T-series, 1997 Chevrolet T-series, 1998 Chevrolet T-series, 1999 Chevrolet T-series, 2000 Chevrolet T-series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 2000 Chevrolet W4, 1996 Ford L Series, 1999 Ford L Series, 1996 GMC C Series, 1997 GMC C Series, 1998 GMC C Series, 1999 GMC C Series, 2000 GMC C Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, 2000 GMC G Series, 1996 GMC K Series, 1997 GMC K Series, 1998 GMC K Series, 1999 GMC K Series, 2000 GMC K Series, 1997 GMC L Series, 1998 GMC L Series, 2000 GMC L Series, 1996 GMC M Series, 1997 GMC M Series, 1998 GMC M Series, 1999 GMC M Series, 2000 GMC M Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S Series, 1997 GMC S Series, 1998 GMC S Series, 1999 GMC S Series, 2000 GMC S Series, 1996 GMC T-series, 1997 GMC T-series, 1998 GMC T-series, 1999 GMC T-series, 2000 GMC T-series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4, 2000 GMC W4, 2000 Isuzu NPR, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series, 2000 Oldsmobile T Series.

2 1996 GMC W4 unknown or other TSB (Bulletin 00148)

Bulletin Date:	Nov. 17, 2000
Component:	Unknown or other.
Bulletin Summary:	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.
Vehicles covered in this TSB:	1996 Chevrolet C Series, 1997 Chevrolet C Series, 1998 Chevrolet C Series, 1999 Chevrolet C Series, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 1996 Chevrolet K Series, 1997 Chevrolet K Series, 1998 Chevrolet K Series, 1999 Chevrolet K Series, 1996 Chevrolet L Series, 1997 Chevrolet L Series, 1998 Chevrolet L Series, 1999 Chevrolet L Series, 1996 Chevrolet M, 1997 Chevrolet M, 1998 Chevrolet M, 1999 Chevrolet M, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1996 Chevrolet S Series, 1997 Chevrolet S Series, 1998 Chevrolet S Series, 1999 Chevrolet S Series, 1996 Chevrolet T-series, 1997 Chevrolet T-series, 1998 Chevrolet T-series, 1999 Chevrolet T-series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 1996 Ford L Series, 1999 Ford L Series, 1996 GMC C Series, 1997 GMC C Series, 1998 GMC C Series, 1999 GMC C Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, 1996 GMC K Series, 1997 GMC K Series, 1998 GMC K Series, 1999 GMC K Series, 1997 GMC L Series, 1998 GMC L Series, 1996 GMC M Series, 1997 GMC M Series, 1998 GMC M Series, 1999 GMC M Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S Series, 1997 GMC S Series, 1998 GMC S Series, 1999 GMC S Series, 1996 GMC T-series, 1997 GMC T-series, 1998 GMC T-series, 1999 GMC T-series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4.

3 1996 GMC W4 cruise control TSB (Bulletin 99066C)

Bulletin Date:	Nov. 14, 2000
Component:	Cruise control.
Bulletin Summary:	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 o
Vehicles covered in this TSB:	1999 Cadillac C/k Series, Cadillac Cadillac Truck, 1996 Chevrolet C/k Pickups, 1997 Chevrolet C/k Pickups, 1998 Chevrolet C/k Pickups, 1999 Chevrolet C/k Pickups, Chevrolet Chevrolet Truck, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 1997 Chevrolet M/L, 1998 Chevrolet M/L, 1999 Chevrolet M/L, 1996 Chevrolet M/l Series, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1996 Chevrolet S/t Series, 1997 Chevrolet S/t Series, 1998 Chevrolet S/t Series, 1999 Chevrolet S/t Series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 1996 GMC C/k Series, 1997 GMC C/k Series, 1998 GMC C/k Series, 1999 GMC C/k Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, GMC Gmc Truck, 1996 GMC M/l Series, 1997 GMC M/l Series, 1998 GMC M/l Series, 1999 GMC M/l Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S/t Series, 1997 GMC S/t Series, 1998 GMC S/t Series, 1999 GMC S/t Series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4, Oldsmobile Oldsmobile Truck, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

4 1996 GMC W4 gasoline fuel injection system injectors TSB (Bulletin 99066C)

Bulletin Date:	Nov. 1, 2000
Component:	Gasoline fuel injection system injectors.
Bulletin Summary:	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).
Vehicles covered in this TSB:	1999 Cadillac C/k Series, 1996 Chevrolet C/k Pickups, 1997 Chevrolet C/k Pickups, 1998 Chevrolet C/k Pickups, 1999 Chevrolet C/k Pickups, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 1997 Chevrolet M/L, 1998 Chevrolet M/L, 1999 Chevrolet M/L, 1996 Chevrolet M/l Series, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1996 Chevrolet S/t Series, 1997 Chevrolet S/t Series, 1998 Chevrolet S/t Series, 1999 Chevrolet S/t Series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 1996 GMC C/k Series, 1997 GMC C/k Series, 1998 GMC C/k Series, 1999 GMC C/k Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, 1996 GMC M/l Series, 1997 GMC M/l Series, 1998 GMC M/l Series, 1999 GMC M/l Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S/t Series, 1997 GMC S/t Series, 1998 GMC S/t Series, 1999 GMC S/t Series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

5 1996 GMC W4 cruise control TSB (Bulletin 99066C)

Bulletin Date:	Nov. 1, 2000
Component:	Cruise control.
Bulletin Summary:	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).
Vehicles covered in this TSB:	1999 Cadillac C/k Series, Cadillac Cadillac Truck, 1996 Chevrolet C/k Pickups, 1997 Chevrolet C/k Pickups, 1998 Chevrolet C/k Pickups, 1999 Chevrolet C/k Pickups, Chevrolet Chevrolet Truck, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 1997 Chevrolet M/L, 1998 Chevrolet M/L, 1999 Chevrolet M/L, 1996 Chevrolet M/l Series, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1999 Chevrolet S/t Pickup, 1996 Chevrolet S/t Series, 1997 Chevrolet S/t Series, 1998 Chevrolet S/t Series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 1996 GMC C/k Series, 1997 GMC C/k Series, 1998 GMC C/k Series, 1999 GMC C/k Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, GMC Gmc Truck, 1996 GMC M/l Series, 1997 GMC M/l Series, 1998 GMC M/l Series, 1999 GMC M/l Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S/t Series, 1997 GMC S/t Series, 1998 GMC S/t Series, 1999 GMC S/t Series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4, Oldsmobile Oldsmobile Truck, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

6 1996 GMC W4 gasoline engine TSB (Bulletin 99066B)

Bulletin Date:	May. 1, 2000
Component:	Gasoline engine.
Bulletin Summary:	Some owners may experience a service engine soon light, misfire, rough idle or hard start. *
Vehicles covered in this TSB:	1999 Cadillac K Series, 1996 Chevrolet C Series, 1997 Chevrolet C Series, 1998 Chevrolet C Series, 1999 Chevrolet C Series, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1999 Chevrolet G Series, 1996 Chevrolet K Series, 1997 Chevrolet K Series, 1998 Chevrolet K Series, 1999 Chevrolet K Series, 1996 Chevrolet L Series, 1997 Chevrolet L Series, 1998 Chevrolet L Series, 1999 Chevrolet L Series, 1996 Chevrolet M, 1997 Chevrolet M, 1998 Chevrolet M, 1999 Chevrolet M, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1999 Chevrolet P, 1996 Chevrolet S Series, 1997 Chevrolet S Series, 1998 Chevrolet S Series, 1999 Chevrolet S Series, 1996 Chevrolet T-series, 1997 Chevrolet T-series, 1998 Chevrolet T-series, 1999 Chevrolet T-series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1999 Chevrolet W4, 1996 Ford L Series, 1999 Ford L Series, 1996 GMC C Series, 1997 GMC C Series, 1998 GMC C Series, 1999 GMC C Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, 1996 GMC K Series, 1997 GMC K Series, 1998 GMC K Series, 1999 GMC K Series, 1997 GMC L Series, 1998 GMC L Series, 1996 GMC M Series, 1997 GMC M Series, 1998 GMC M Series, 1999 GMC M Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1999 GMC P Series, 1996 GMC S Series, 1997 GMC S Series, 1998 GMC S Series, 1999 GMC S Series, 1996 GMC T-series, 1997 GMC T-series, 1998 GMC T-series, 1999 GMC T-series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1999 GMC W4, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

7 1996 GMC W4 cruise control TSB (Bulletin 99066A)

Bulletin Date:	Feb. 1, 2000
Component:	Cruise control.
Bulletin Summary:	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.
Vehicles covered in this TSB:	1996 Chevrolet C Series, 1997 Chevrolet C Series, 1998 Chevrolet C Series, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1996 Chevrolet K Series, 1997 Chevrolet K Series, 1998 Chevrolet K Series, 1996 Chevrolet L Series, 1997 Chevrolet L Series, 1998 Chevrolet L Series, 1994 Chevrolet M, 1997 Chevrolet M, 1998 Chevrolet M, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1996 Chevrolet S Series, 1997 Chevrolet S Series, 1998 Chevrolet S Series, 1996 Chevrolet T-series, 1997 Chevrolet T-series, 1998 Chevrolet T-series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1996 Ford L Series, 1996 GMC C Series, 1997 GMC C Series, 1998 GMC C Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1996 GMC K Series, 1997 GMC K Series, 1998 GMC K Series, 1997 GMC L Series, 1998 GMC L Series, 1996 GMC M Series, 1997 GMC M Series, 1998 GMC M Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1996 GMC S Series, 1997 GMC S Series, 1998 GMC S Series, 1996 GMC T-series, 1997 GMC T-series, 1998 GMC T-series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

8 1996 GMC W4 gasoline fuel injection system injectors TSB (Bulletin 99066A)

Bulletin Date:	Feb. 1, 2000
Component:	Gasoline fuel injection system injectors.
Bulletin Summary:	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).
Vehicles covered in this TSB:	1996 Chevrolet C Series, 1997 Chevrolet C Series, 1998 Chevrolet C Series, 1996 Chevrolet G Series, 1997 Chevrolet G Series, 1998 Chevrolet G Series, 1996 Chevrolet K Series, 1997 Chevrolet K Series, 1998 Chevrolet K Series, 1996 Chevrolet L Series, 1997 Chevrolet L Series, 1998 Chevrolet L Series, 1996 Chevrolet M, 1997 Chevrolet M, 1998 Chevrolet M, 1996 Chevrolet P, 1997 Chevrolet P, 1998 Chevrolet P, 1996 Chevrolet S Series, 1997 Chevrolet S Series, 1998 Chevrolet S Series, 1996 Chevrolet T-series, 1997 Chevrolet T-series, 1998 Chevrolet T-series, 1996 Chevrolet W4, 1997 Chevrolet W4, 1998 Chevrolet W4, 1996 Ford L Series, 1996 GMC C Series, 1997 GMC C Series, 1998 GMC C Series, 1996 GMC G Series, 1997 GMC G Series, 1998 GMC G Series, 1996 GMC K Series, 1997 GMC K Series, 1998 GMC K Series, 1997 GMC L Series, 1998 GMC L Series, 1996 GMC M Series, 1997 GMC M Series, 1998 GMC M Series, 1996 GMC P Series, 1997 GMC P Series, 1998 GMC P Series, 1996 GMC S Series, 1997 GMC S Series, 1998 GMC S Series, 1996 GMC T-series, 1997 GMC T-series, 1998 GMC T-series, 1996 GMC W4, 1997 GMC W4, 1998 GMC W4, 1996 Oldsmobile T Series, 1997 Oldsmobile T Series, 1998 Oldsmobile T Series.

9 1996 GMC W4 engine TSB (Bulletin 97061A)

Bulletin Date:	Apr. 1, 1998
Component:	Engine.
Bulletin Summary:	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.
Vehicles covered in this TSB:	1995 Chevrolet W4, 1996 Chevrolet W4, 1997 Chevrolet W4, 1995 GMC W4, 1996 GMC W4, 1997 GMC W4.

10 1996 GMC W4 gasoline engine TSB (Bulletin 97061A)

Bulletin Date:	Apr. 1, 1998
Component:	Gasoline engine.
Bulletin Summary:	Exhibiting a condition in which the closed system design of the current pcv system may allow engine oil to enter the intake system.
Vehicles covered in this TSB:	1995 Chevrolet W4, 1996 Chevrolet W4, 1997 Chevrolet W4, 1995 GMC W4, 1996 GMC W4, 1997 GMC W4.

11 1996 GMC W4 vehicle speed control TSB (Bulletin 767101)

Bulletin Date:	Apr. 1, 1997
Component:	Vehicle speed control.
Bulletin Summary:	Delayed upshift (adjust accelerator cable/tps/kickdown switch).
Vehicles covered in this TSB:	1995 Chevrolet Tiltmaster, 1996 Chevrolet Tiltmaster, 1997 Chevrolet Tiltmaster, 1995 GMC W4, 1996 GMC W4, 1997 GMC W4.

12 1996 GMC W4 steering gear box (other than rack and pinion) TSB (Bulletin 763101)

Bulletin Date:	Apr. 1, 1997
Component:	Steering gear box (other than rack and pinion).
Bulletin Summary:	Premature outside edge wear on radial front tires (reset toe in).
Vehicles covered in this TSB:	1991 Chevrolet Tiltmaster, 1992 Chevrolet Tiltmaster, 1993 Chevrolet Tiltmaster, 1994 Chevrolet Tiltmaster, 1995 Chevrolet Tiltmaster, 1997 Chevrolet Tiltmaster, 1991 GMC W4, 1992 GMC W4, 1993 GMC W4, 1994 GMC W4, 1995 GMC W4, 1996 GMC W4, 1997 GMC W4, GMC W4.

13 1996 GMC W4 ignition module TSB (Bulletin 766504)

Bulletin Date:	Mar. 1, 1997
Component:	Ignition module.
Bulletin Summary:	Malfunction indicator light (mil) on, poor driveability conditions (perform flash calibration).
Vehicles covered in this TSB:	1996 Chevrolet G Series, 1997 Chevrolet G Series, 1996 Chevrolet P, 1997 Chevrolet P, 1996 Chevrolet Tiltmaster, 1997 Chevrolet Tiltmaster, 1996 Chevrolet W4, 1997 Chevrolet W4, 1996 GMC G Series, 1997 GMC G Series, 1996 GMC P Series, 1997 GMC P Series, 1996 GMC W4, 1997 GMC W4, 1996 Oldsmobile Bravada, 1997 Oldsmobile Bravada.

14 1996 GMC W4 tank assembly filler pipe and cap TSB (Bulletin 666308)

Bulletin Date:	Jan. 1, 1997
Component:	Tank assembly filler pipe and cap.
Bulletin Summary:	Reduced engine performance (replace fuel tank cap).
Vehicles covered in this TSB:	1996 GMC W4.

Also see GMC vehicle common problems.

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