HVAC Control Module Reprogramming
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. 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 the HVAC Control Module. Refer to Service Programming System (SPS) .