Car Problem Reports

GMC Sonoma Intake Manifold Gaskets May Leak Coolant or Engine Oil

GMC Sonoma Problem
9 Reports
Me Too

Model Years Affected: 1991, 1992, 1993, 1994, 1995, 2000

Engines Affected: 2.8L V6, 4.3L V6

Average Mileage: 119,125 mi (82,376 mi - 150,000 mi)


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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