K 1500 Truck 4WD V8-4.8L VIN V (1999)
Heater Core: Service and Repair
Without A/C
HEATER CORE REPLACEMENT
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
1. Disconnect the negative battery cable.
2. Drain the engine coolant. See: Service and Repair
3. Disconnect the heater hoses. See: Heater Hose/Service and Repair
4. Disconnect the temperature control cable from the heater/ventilation module.
5. Disconnect the mode control cable from the heater/ventilation module.
6. Remove the Instrument Panel (IP) carrier. See: Instrument Panel, Gauges and Warning Indicators/Instrument Cluster / Carrier/Service and Repair
7. Disconnect the electrical harnesses and the ground connections as necessary.
8. Remove the heater/ventilation module mounting nuts and the screws.
9. Remove the heater/ventilation module assembly. Set the module assembly on a bench.
10. Remove the heater core cover screws.
