1991 GMC P SERIES TSBs (6)

Bulletin:: 476149
Component:: 980000 unknown or other
Summary:: oil pressure gauge reading concerns. *tw
Bulletin:: 376602A
Component:: 063200 engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe
Summary:: new cast iron exhaust manifold and stainless steel gasket to correct engine noise condition. *tw
Bulletin:: 376105
Component:: 061100 engine and engine cooling:engine:gasoline
Summary:: cold engine knock. *tw
Bulletin:: 98831110
Component:: 063000 engine and engine cooling:exhaust system
Summary:: Vehicles with 6.0l and 7.0l engines (vins p, m - rpos ls0, lr0) may exhibit engine exhaust noise which is loudest during cold engine operation. *yc
Bulletin:: 9802676121B
Component:: 061000 engine and engine cooling:engine
Summary:: Comments on engine exhaust noise which is normally loudest during cold engine operation. *yc
Bulletin:: 000604002
Component:: 061100 engine and engine cooling:engine:gasoline
Summary:: Subject regarding a hard, no start or excessive gray or white smoke condition on start up after recent glow plug replacement. *tt