Coolant Leak From Heater Core on GMC S15 Jimmy

The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.

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Average mileage: (–)
2 model years affected: 1990, 1991
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