Highter Than Nornal Idle Due to Vacuum Leak on Chevrolet 2500 Pickup

Problem Description and Possible Solution

The throttle body gasket may develop a vacuum leak which may result in a higher than normal engine idle. Failed gaskets will require replacement.

Problem Data
RepairPal Verified
Average mileage: (–)
Engine affected: Gasoline
11 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000
12 people reported this problem