Coolant Leak & Engine Overheating on GMC Safari

A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.

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Average mileage: 220,000 (220,000–220,000)
Engine affected: 4.3L V6
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1999
8 people reported this problem
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Strange runs at normal temp then suddenly overheats. Radiator cap never hot to the touch. Sometimes I have no heat. Sometimes it leaks requiring filling as a radiator. As are times it seems to leak like the sieve. Probably water pop could be thermostat