Coolant Loss and/or Engine Overheating on GMC Suburban 2500

A coolant leak may develop form the Intake manifold gasket causing overheating complaints. The coolant leak may be internal allowing coolant to mix with the engine oil, this condition can result in internal engine damage. Be aware that this problem is often mistaken as a blown head gasket.

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Average mileage: (–)
2 model years affected: 1990, 1991
2 people reported this problem
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