Car Problem Reports

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

GMC 3500 Pickup Problem
6 Reports
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Model Years Affected: 1996, 1997, 1998, 1999, 2000

Engines Affected: 5.7L V8, Gasoline


An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.

  • Visitor, , 5.7L V8, 48,860 mi

    When you start the truck, the idle goes high, and when I put in drive, it comes to normal!!
    What that could be?

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