Auxiliary HVAC Control Module Reprogramming
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Do not reprogram the auxiliary HVAC control module, unless directed by a service procedure, or a service bulletin.
Reprogram HVAC Control Module-Refer to HVAC System Control Module Programming and Setup .