Close
GMC
1500 Pickup
10

Highter Than Nornal Idle Due to Vacuum Leak on GMC 1500 Pickup

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 118,900 (17,800–220,000)
Engines affected: 5.0L V8, 5.7L V8, Gasoline
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
10 people reported this problem
Comments
Viewing 1 - 1 of 1 comments
replaced intake gaskets and TBI gaskets, still has occasional high idle and stalls constantly.