Table 1 shows nine common engine and engine cooling related problems of the 1999 GMC Sierra. The number one most common problem is related to the gasoline engine (three problems). The second most common problem is related to the manifold/header/muffler/tail pipe (three problems).
The rear rotors u-joint, carbon build up on throttle, replaced window motor uses 2 qts of oil every 400 to 500 miles , transmission uses 1 qt of oil every 20000 miles , air conditioner fan does not work on high I believe the throttle build up is a safety issue with the gas petal sticking. Read details...
Two broken manifold bolts in rear drivers side of engine on 5. 3 vortec engine, exhaust leak from where manifold has separated form head. Carbon buildup and discoloration visible. High temp exhaust being released under the hood. Read details...
Brake fluid leaking all over bottom of truck spraying out I took to a mechanic and had 1000 dollar brake line job done got truck back and abs brakes worked like manual brakes had a sensor and 2 ball joints replaced im being ripped of from a GMC loyal customer I was I guess back to Ford or Toyota Read details...