HVAC Control Module Reprogramming
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Do not reprogram the HVAC control module, unless directed by a service procedure, or a service bulletin.
Reprogram HVAC Control Module-Refer to Service Programming System (SPS) .