C 1500 Yukon 2WD V8-5.3L VIN Z Flex Fuel (2003)
6. Remove the nuts (2) from the studs (1) that secure the auxiliary HVAC module to the underside of the vehicle.
7. Lower the vehicle.
8. Remove the right rear quarter trim panel.
9. Remove the electronic suspension control module.
10. Disconnect the electrical connectors from the Auxiliary HVAC module.
11. Remove the fastener (5) for the upper auxiliary air duct (1). Carefully slide the duct up, into the headliner, until the bottom edge of the duct is
above the air distributor duct.
12. Remove the fasteners (3) retaining the auxiliary HVAC module to the vehicle.
13. Remove the auxiliary HVAC module (4) from the vehicle.