Intake Manifold Gasket May Leak Coolant or Engine Oil on GMC Jimmy

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.

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Average mileage: 105,000 (85,000–125,000)
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 2001
8 people reported this problem
2 people shared problem details
2001 GMC Jimmy85,000
new intake manifold gasket installed
THE INTAKE HOSE JUST CAME OFF WHILE IN A PARKING LOT THANK GOD. I COULDN'T GET THE JIMMY TO STOP I HAD TO STAND ON BRAKES. IT ALSO HAD A LEAK RAN BAD TILL I REPLACED THE O-RING.
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