Car Problem Reports

GMC Suburban 2500 Idling Problems Due to Vacuum Leak in Throttle Body Gasket

GMC Suburban 2500 Problem
5 Reports
Me Too

Model Years Affected: 1996, 1997, 1998, 1999

Engines Affected: 5.7L V8, 7.4L V8


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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