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Technical Service Bulletins of the 1998 GMC C7

There have been 14 technical service bulletins issued for the 1998 GMC C7.

1 1998 GMC C7 steering power assist pump TSB (Bulletin SB-06-02-32-013B)

Bulletin Date:	Aug. 1, 2009
Component:	Steering power assist pump.
Bulletin Summary:	SAAB/hummer/gm: diagnostic tips/recommendations when power steering pump replacement is necessary. Analysis of returned power steering (ps) pumps that had been replaced for noise, no power assist, no or low pressure and leaking conditio
Vehicles covered in this TSB:	2007 GMC Acadia, 2008 GMC Acadia, 2009 GMC Acadia, 2010 GMC Acadia, 1998 GMC ALL, 1999 GMC All Passenger Cars And Li, 1997 GMC B Series, 1998 GMC B Series, 1999 GMC B Series, 2000 GMC B Series, 2001 GMC B Series, 1997 GMC B7, 1998 GMC B7, 1999 GMC B7, 2000 GMC B7, 2001 GMC B7, 2002 GMC B7, 1997 GMC B7T042, 1998 GMC Blazer, 1999 GMC Blazer, 2000 GMC Blazer, 2001 GMC Blazer, 2002 GMC Blazer, 1999 GMC C Pickup, 2000 GMC C Pickup, 1997 GMC C Series, 1998 GMC C Series, 1999 GMC C Series, 2000 GMC C Series, 2001 GMC C Series, 2002 GMC C Series, 2007 GMC C Series, 2008 GMC C Series, 2009 GMC C Series, 1999 GMC C Series (light), 1997 GMC C Series(light), 1999 GMC C/k 1500, 2000 GMC C/k 1500, 2001 GMC C/k 1500, 2002 GMC C/k 1500, 1997 GMC C/k Pickup, 1998 GMC C/k Pickup, 1999 GMC C/k Pickup, 2000 GMC C/k Pickup, 2001 GMC C/k Pickup, 2002 GMC C/k Pickup, 1997 GMC C/k Series, 1998 GMC C/k Series, 1999 GMC C/k Series, 2000 GMC C/k Series, 2001 GMC C/k Series, 2002 GMC C/k Series, 2003 GMC C/k Series, 1997 GMC C15, 1998 GMC C15, 1999 GMC C15, 2000 GMC C15, 2001 GMC C15, 1997 GMC C1500, 1998 GMC C1500, 1999 GMC C1500, 2000 GMC C1500, 2001 GMC C1500, 2002 GMC C1500, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7, 2001 GMC C7, 1998 GMC C7500, 1999 GMC C7500, 2000 GMC C7500, 2001 GMC C7500, 2002 GMC C7500, 2004 GMC Canyon, 2005 GMC Canyon, 2006 GMC Canyon, 2007 GMC Canyon, 2008 GMC Canyon, 2009 GMC Canyon, 2010 GMC Canyon, 1999 GMC Conventional, 2000 GMC Conventional, 2001 GMC Conventional, 2003 GMC Conventional, 1998 GMC Denali, 1999 GMC Denali, 2000 GMC Denali, 2001 GMC Denali, 2002 GMC Denali, 2003 GMC Denali, 2000 GMC Diamond Edition, 2001 GMC Diamond Edition, 1997 GMC Envoy, 1998 GMC Envoy, 1999 GMC Envoy, 2000 GMC Envoy, 2001 GMC Envoy, 2002 GMC Envoy, 2003 GMC Envoy, 2004 GMC Envoy, 2005 GMC Envoy, 2006 GMC Envoy, 2007 GMC Envoy, 2008 GMC Envoy, 2009 GMC Envoy, 1998 GMC F Series, 1999 GMC F Series, 2000 GMC F Series, 2001 GMC F Series, 2004 GMC F Series, 2005 GMC F Series, 2006 GMC F Series, 1997 GMC F6, 1998 GMC F6, 1999 GMC F6, 2000 GMC F6, 2001 GMC F6, 1997 GMC F7, 1998 GMC F7, 1999 GMC F7, 2000 GMC F7, 2001 GMC F7, 1997 GMC G Series, 1998 GMC G Series, 1999 GMC G Series, 2000 GMC G Series, 2001 GMC G Series, 2002 GMC G Series, 2003 GMC G Series, 1997 GMC G Van, 1998 GMC G Van, 1999 GMC G Van, 2000 GMC G Van, 2001 GMC G Van, 2002 GMC G Van, 1997 GMC G-van, 1998 GMC G-van, 1997 GMC G10, 1997 GMC G1500, 1998 GMC G1500, 2003 GMC G1500, 2004 GMC G1500, 2005 GMC G1500, 2006 GMC G1500, 2007 GMC G1500, 2008 GMC G1500, 1999 GMC G2 Van, 1997 GMC G25, 1998 GMC G25, 1999 GMC G25, 2000 GMC G25, 2001 GMC G25, 2002 GMC G25, 1997 GMC G2500, 1998 GMC G2500, 2003 GMC G2500, 2004 GMC G2500, 2005 GMC G2500, 1999 GMC G3 Van, 1997 GMC G30, 1997 GMC G35, 1998 GMC G35, 1999 GMC G35, 2000 GMC G35, 2001 GMC G35, 2002 GMC G35, 1997 GMC G3500, 1998 GMC G3500, 2003 GMC G3500, 2004 GMC G3500, 2005 GMC G3500, 2001 GMC GM, 2002 GMC GM, 1997 GMC GMC, 1998 GMC GMC, 1999 GMC GMC, 2000 GMC GMC, 2001 GMC GMC, 2002 GMC GMC, 2003 GMC GMC, 1997 GMC Gmc Truck, 1998 GMC Gmc Truck, 1999 GMC Gmc Truck, 2000 GMC Gmc Truck, 2001 GMC Gmc Truck, 2002 GMC Gmc Truck, 2003 GMC Gmc Truck, 2003 GMC Gmt 560, 2004 GMC Gmt 560, 2005 GMC Gmt 560, 1999 GMC Gmt 800, 2000 GMC Gmt 800, 2001 GMC Gmt 800, 2002 GMC Gmt 800, 1997 GMC H Series, 1998 GMC H Series, 2009 GMC Hhr Ss, 1997 GMC Jimmy, 1998 GMC Jimmy, 1999 GMC Jimmy, 2000 GMC Jimmy, 2001 GMC Jimmy, 2002 GMC Jimmy, 2003 GMC Jimmy, 2004 GMC Jimmy, 2005 GMC Jimmy Classic, 2004 Hummer H2, 2005 Hummer H2, 2006 Hummer H2, 2007 Hummer H2, 2008 Hummer H2, 2009 Hummer H2, 2010 Hummer H2, 2003 Hummer H3, 2004 Hummer H3, 2005 Hummer H3, 2006 Hummer H3, 2007 Hummer H3, 2008 Hummer H3, 2009 Hummer H3, 2010 Hummer H3, 2003 Hummer Hummer H2, 2004 Hummer Hummer H2, 2005 Hummer Hummer H2, 2006 Hummer Hummer H2, 2007 Hummer Hummer H2, 2008 Hummer Hummer H2, 2009 Hummer Hummer H2, 2007 Hummer Hummer H3, 2008 Hummer Hummer H3, 2009 Hummer Hummer H3, 2010 Hummer Hummer H3, 2005 SAAB 9-7x, 2006 SAAB 9-7x, 2007 SAAB 9-7x, 2008 SAAB 9-7x, 2009 SAAB 9-7x.

2 1998 GMC C7 manual transmission TSB (Bulletin 020729005)

Bulletin Date:	Jun. 1, 2002
Component:	Manual transmission.
Bulletin Summary:	Subject regarding vibration or transmission output shaft damage / oil seal leak on conventional cab medium duty models.
Vehicles covered in this TSB:	1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 2001 Chevrolet C6, 2002 Chevrolet C6, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 2001 Chevrolet C7, 2002 Chevrolet C7, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 2001 GMC C6, 2002 GMC C6, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7, 2001 GMC C7, 2002 GMC C7.

3 1998 GMC C7 gasoline engine TSB (Bulletin 000601013A)

Bulletin Date:	May. 1, 2002
Component:	Gasoline engine.
Bulletin Summary:	Information pertaining to the release of the exhaust manifold / turbocharger heat shield.
Vehicles covered in this TSB:	1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 2001 Chevrolet C6, 2002 Chevrolet C6, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 2001 Chevrolet C7, 2002 Chevrolet C7, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 2001 GMC C6, 2002 GMC C6, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7, 2001 GMC C7, 2002 GMC C7.

4 1998 GMC C7 alternator/generator/regulator TSB (Bulletin 010603003)

Bulletin Date:	Mar. 1, 2001
Component:	Alternator/generator/regulator.
Bulletin Summary:	Some drivers may comment that the generator upper mounting bolt is breaking on certain conventional medium duty models.
Vehicles covered in this TSB:	1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 1996 GMC C6, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7.

5 1998 GMC C7 windshield wiper/washer TSB (Bulletin 010843002)

Bulletin Date:	Mar. 1, 2001
Component:	Windshield wiper/washer.
Bulletin Summary:	Some customers may comment that the windshield (w/s) washer reservoir shows an unexplained reduced fluid level after vehicle operation.
Vehicles covered in this TSB:	1990 Chevrolet C6, 1991 Chevrolet C6, 1992 Chevrolet C6, 1993 Chevrolet C6, 1994 Chevrolet C6, 1995 Chevrolet C6, 1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 2001 Chevrolet C6, 1990 Chevrolet C7, 1991 Chevrolet C7, 1992 Chevrolet C7, 1993 Chevrolet C7, 1994 Chevrolet C7, 1995 Chevrolet C7, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 2001 Chevrolet C7, 1990 GMC C6, 1991 GMC C6, 1992 GMC C6, 1993 GMC C6, 1994 GMC C6, 1995 GMC C6, 1996 GMC C6, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 2001 GMC C6, 1990 GMC C7, 1991 GMC C7, 1992 GMC C7, 1993 GMC C7, 1994 GMC C7, 1995 GMC C7, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7, 2001 GMC C7.

6 1998 GMC C7 brake antilock abs warning light TSB (Bulletin 000525004)

Bulletin Date:	Dec. 1, 2000
Component:	Brake antilock abs warning light.
Bulletin Summary:	Some drivers may comment about the abs lamp illuminating. An abs diagnostic trouble code 0281 - brake switch circuit may have been set on those vehicles equipped with hydraulic brakes. The diagnostic trouble code will be stored in memor
Vehicles covered in this TSB:	1995 Chevrolet B7, 1996 Chevrolet B7, 1997 Chevrolet B7, 1998 Chevrolet B7, 1999 Chevrolet B7, 2000 Chevrolet B7, 1995 Chevrolet C6, 1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 1995 Chevrolet C7, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 1995 GMC B7, 1996 GMC B7, 1997 GMC B7, 1998 GMC B7, 1999 GMC B7, 2000 GMC B7, 1995 GMC C6, 1996 GMC C6, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 1995 GMC C7, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7.

7 1998 GMC C7 gasoline engine TSB (Bulletin 000604047)

Bulletin Date:	Nov. 1, 2000
Component:	Gasoline engine.
Bulletin Summary:	Some medium duty models with 3126 caterpillar diesel engine and allison automatic transmission may exhibit an engine speed power takeoff (pto) operation returning to idle for no apparent reason.
Vehicles covered in this TSB:	1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 2001 Chevrolet C6, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 2001 Chevrolet C7, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 2001 GMC C6, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7, 2001 GMC C7.

8 1998 GMC C7 clutch assembly TSB (Bulletin 000731001)

Bulletin Date:	Sep. 1, 2000
Component:	Clutch assembly.
Bulletin Summary:	Experiencing noisy release bearing, slipping clutch or inoerative clutch.
Vehicles covered in this TSB:	1993 Chevrolet B7, 1994 Chevrolet B7, 1995 Chevrolet B7, 1996 Chevrolet B7, 1997 Chevrolet B7, 1998 Chevrolet B7, 1999 Chevrolet B7, 2000 Chevrolet B7, 1990 Chevrolet C6, 1991 Chevrolet C6, 1992 Chevrolet C6, 1993 Chevrolet C6, 1994 Chevrolet C6, 1995 Chevrolet C6, 1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 1990 Chevrolet C7, 1991 Chevrolet C7, 1992 Chevrolet C7, 1993 Chevrolet C7, 1994 Chevrolet C7, 1995 Chevrolet C7, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 1993 GMC B7, 1994 GMC B7, 1995 GMC B7, 1996 GMC B7, 1997 GMC B7, 1998 GMC B7, 1999 GMC B7, 2000 GMC B7, 1990 GMC C6, 1991 GMC C6, 1992 GMC C6, 1993 GMC C6, 1994 GMC C6, 1995 GMC C6, 1996 GMC C6, 1997 GMC C6, 1999 GMC C6, 2000 GMC C6, 1990 GMC C7, 1991 GMC C7, 1992 GMC C7, 1993 GMC C7, 1994 GMC C7, 1995 GMC C7, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7.

9 1998 GMC C7 exterior lighting TSB (Bulletin 00015)

Bulletin Date:	May. 1, 2000
Component:	Exterior lighting.
Bulletin Summary:	On some medium duty trucks equipped with a diesel engine, air brakes, and the engine shutdown feature, the multi-function alarm module may not perform certain features such as: no warning tone for air brake low pressure; no warning tone f
Vehicles covered in this TSB:	1998 Chevrolet C6, 1998 Chevrolet C7, 1998 Chevrolet T6 Series, 1998 Chevrolet T7 Series, 1998 GMC C6, 1998 GMC C7, 1998 GMC T-series, 1998 GMC T7 Series.

10 1998 GMC C7 structure TSB (Bulletin 000863001)

Bulletin Date:	Feb. 1, 2000
Component:	Structure.
Bulletin Summary:	Some vehicles may experience on the cab assist step cracking around the mounting bolts.
Vehicles covered in this TSB:	1995 Chevrolet C6, 1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 1995 Chevrolet C7, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 1995 GMC C6, 1996 GMC C6, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 1995 GMC C7, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7.

11 1998 GMC C7 structure TSB (Bulletin 000863001A)

Bulletin Date:	Feb. 1, 2000
Component:	Structure.
Bulletin Summary:	Some owners may comment on the cab assist step cracking around the mounting bolts.
Vehicles covered in this TSB:	1995 Chevrolet C6, 1996 Chevrolet C6, 1997 Chevrolet C6, 1998 Chevrolet C6, 1999 Chevrolet C6, 2000 Chevrolet C6, 1995 Chevrolet C7, 1996 Chevrolet C7, 1997 Chevrolet C7, 1998 Chevrolet C7, 1999 Chevrolet C7, 2000 Chevrolet C7, 1995 GMC C6, 1996 GMC C6, 1997 GMC C6, 1998 GMC C6, 1999 GMC C6, 2000 GMC C6, 1995 GMC C7, 1996 GMC C7, 1997 GMC C7, 1998 GMC C7, 1999 GMC C7, 2000 GMC C7.

12 1998 GMC C7 cooling system radiator assembly TSB (Bulletin 990620014)

Bulletin Date:	Jul. 1, 1999
Component:	Cooling system radiator assembly.
Bulletin Summary:	On some medium duty conventional models, the radiator surge tank cap contacting underside of hood.
Vehicles covered in this TSB:	1998 Chevrolet C6, 1999 Chevrolet C6, 1998 Chevrolet C7, 1999 Chevrolet C7, 1998 GMC C6, 1999 GMC C6, 1998 GMC C7, 1999 GMC C7.

13 1998 GMC C7 automatic transmission TSB (Bulletin 867118)

Bulletin Date:	Nov. 1, 1998
Component:	Automatic transmission.
Bulletin Summary:	Erratic or premature upshifts, harsh down shifts, engine lugging, or low power performance.
Vehicles covered in this TSB:	1998 Chevrolet B7, 1998 Chevrolet C6, 1998 Chevrolet C7, 1998 GMC B7, 1998 GMC C6, 1998 GMC C7.

14 1998 GMC C7 service brakes TSB (Bulletin 98019A)

Bulletin Date:	Jul. 1, 1998
Component:	Service brakes.
Bulletin Summary:	Some vehicles equipped with air brakes and anti-lock brake systems, may exhibit brake control electrical harness chafing.
Vehicles covered in this TSB:	1998 Chevrolet B7, 1998 Chevrolet C6, 1998 Chevrolet C7, 1998 GMC B7, 1998 GMC C6, 1998 GMC C7.

Also see GMC vehicle common problems.

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