GMC 1500 Pickup Problem Report
GMC 1500 Pickup Highter Than Nornal Idle Due to Vacuum Leak
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
replaced intake gaskets and TBI gaskets, still has occasional high idle and stalls constantly. - Mudderfo
a water leak prompted replacement of the intake gaskets which caused a crack in the manifold. r...
I replaced the intake & exhaust gaskets, temp. Sensor, & sending unit. No change If anyone ca...
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...
Will not stay on after it starts have to keep pump the gas pedal