GMC 1500 Pickup Problems

Intake Manifold Gasket May Leak Coolant or Engine Oil on GMC 1500 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.

(30 people reported this problem)

GMC 1500 Pickup Vehicles With This Problem

RepairPal Fair Price Estimate
RepairPal Verified
Average mileage: 155,062 (100,000–206,000)
Engines affected: 4.3L V6, 5.0L V8, 5.7L V8, Gasoline
10 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999
Not Your GMC 1500 Pickup Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
Learn About Your Car Problems
Search For a Specific Car Problem
Viewing 1-9 of 9 comments
lower intake gasket leaking in front of engine right behind/below thermostat. coolant dripped onto tranny cooler lines and dripped off of oil pan by drain bolt.
This was the second set! The first set was replaced at 60,000 miles with the same, problematic AC Delco gaskets. The second setrecently installed are the "improved" Fel-Pro brand gaskets. It is not a matter of "if" the gaslet is going to fail, but "when" is the gaslet going to fail.
Very common on this vehicles, generally you will notice a coolant leak near the front of the intake manifold, above the timing chain cover.
Hello, it just started leaking at the back of intake manifold on the drivers side.