Yukon/Denali XL 1500 4WD V8-6.0L VIN U (2004)
Housing Assembly HVAC: Service and Repair
HVAC Module Assembly Replacement - Auxiliary
HVAC MODULE 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 Vehicle Lifting.
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.
6. Remove the nuts (2) from the studs (1) that secure the auxiliary HVAC module to the underside of the vehicle.
7. Remove the safety stands.
8. Lower the vehicle.
9. Remove the right rear quarter trim panel.
10. Remove the electronic suspension control module.
11. Disconnect the electrical connectors from the auxiliary HVAC module.
