Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Auxiliary HVAC Control Module & Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Remove the right rear quarter trim panel. Refer to Trim Panel Replacement - Rear Quarter - Right (Utility) or Trim Panel Replacement - Rear Quarter - Right (Suburban) in Interior Trim.
Disconnect the electrical connectors (3,4) from the auxiliary HVAC control module (1).
Remove the screws from the auxiliary HVAC control module (1).
Remove the auxiliary HVAC control module (1) from the auxiliary HVAC module (2).