1999 GMC S/T SERIES TSBs (8)

Bulletin:
99066C
Component:
185000 vehicle speed control:cruise control
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
Bulletin:
99066C
Component:
185000 vehicle speed control:cruise control
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).
Bulletin:
000730022B
Component:
106000 power train:axle assembly
Summary:
A no reverse, no second gear, or no fourth gear condition. *tt updated *eh
Bulletin:
99066C
Component:
073200 fuel system, gasoline:fuel injection system:injectors
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). *tt
Bulletin:
010730012
Component:
103000 power train:automatic transmission
Summary:
Information pertaining to the new control valve body, spacer plate and gaskets for the 4l60-e automatic transmission. *tt
Bulletin:
010730023
Component:
103000 power train:automatic transmission
Summary:
Some owners with vehicles built before january 15,1999 may comment on a harsh 1-2 upshift and may also have a check engine light. *et
Bulletin:
010605006
Component:
063000 engine and engine cooling:exhaust system
Summary:
Subject regarding exhaust system rumble / rattle noise. *jg
Bulletin:
000604003B
Component:
061000 engine and engine cooling:engine
Summary:
Rough idle after start, and/or a service engine soon (ses) light. various models including the 1995 chevrolet and gmc s/t models. *tt

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