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Home >> GMC >> 1999 >> Safari Van AWD V6-4.3L VIN W >> Repair and Diagnosis >> Heating and Air Conditioning >> Heater Core >> Service and Repair >> Standard
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Standard

Heater Core Replacement


REMOVAL PROCEDURE
1. Remove the air cleaner.
2. Drain the engine coolant.
Refer to Draining and Filling Cooling System in Engine Cooling.
3. Remove the heater hoses.
4. Remove the screws that retain the cover to the heater assembly.
5. Remove the screws and the straps that retain the heater core to the heater assembly.
6. Remove the heater core from the vehicle.

INSTALLATION PROCEDURE
1. Install the heater core to the vehicle.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the screws and the straps that retain the heater core to the heater assembly.

Tighten
Tighten the screws and the straps that retain the heater core to the heater assembly to 2 N.m (18 lb in).

3. Install the screws that retain the cover to the heater assembly.

Tighten
Tighten the screws that retain the cover to the heater assembly to 2 N.m (18 lb in).

4. Install the heater hoses.
5. Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
6. Ensure that no leaks exist in the cooling system.
7. Install the air cleaner.
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