Highter Than Nornal Idle Due to Vacuum Leak on GMC Suburban 2500

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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Average mileage: (–)
Engine affected: Gasoline
4 model years affected: 1992, 1993, 1994, 1995 more
4 people reported this problem
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