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

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: 119,666 (53,000–157,000)
Engines affected: 5.7L V8, Gasoline
7 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002
14 people reported this problem
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problem details
2001 GMC Savana 3500 - 5.7L V8 130,000 mi,
External coolant leak that diagnosed the problem. Using oil extensively for a couple of months leading up to this.
2001 GMC Savana 3500 - 5.7L V8 53,000 mi,
changed oil and it was light brown with water mix, coolant has to be added regularly from leak. replaced intake manifold gasket
2000 GMC Savana 3500 - 5.7L V8 157,000 mi,
Gasket leaking coolant externally, replace gasket