G 3500 1 Ton Van V8-350 5.7L VIN K TBI (1987)
Heater Core: Service and Repair
Removal
1. Remove battery ground cable.
2. Remove coolant recovery tank.
3. Remove heater core hoses.
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Place a clean pan under the vehicle to catch any coolant spillage.
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Plug the hoses.
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Allow coolant in the core to drain into the pan.
