HVAC Control Module Reprogramming
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. 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) .