Problem Reports
GMC 2500 Pickup
Report: Idling Problems Due to Vacuum Leak in Throttle Body Gasket
GMC 2500 Pickup Problem
6 Reports
Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995
Engine Affected: Gasoline
Verified
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
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