Car Problem Reports

GMC Vandura 3500 Idling Problems Due to Vacuum Leak in Throttle Body Gasket

 
GMC Vandura 3500 Problem
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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.