Intake Manifold Gasket May Leak Coolant or Engine Oil on GMC 3500 Pickup

Problem Description and Possible Solution

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.

Problem Data
RepairPal Verified
Average mileage: 140,853 (102,560–202,000)
Engines affected: 5.7L V8, Gasoline
11 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000
14 people reported this problem
Viewing 1 - 3 of 3 problem details
Coolant leaking from engine block
intake gasket leaking
leaking coolant from intake manifold