GMC
Jimmy
2

Highter Than Nornal Idle Due to Vacuum Leak on GMC Jimmy

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: (–)
2 model years affected: 1990, 1991
2 people reported this problem