K 2500 Yukon 4WD V8-6.0L VIN U (2000)
Heater Core: Service and Repair
Heater Core Replacement - Auxiliary
REMOVAL PROCEDURE
1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.
2. Drain the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
4. Disconnect the heater lines (2, 3) from the auxiliary HVAC module at the underside of the vehicle.
5. Disconnect the air conditioning lines (2, 3) from the auxiliary HVAC module at the underside of the vehicle.
