GM Service Manual Online
For 1990-2009 cars only

Each of the following service procedures may require programming or setup procedures to be performed on the auxiliary HVAC control module or auxiliary HVAC actuators.

Auxiliary HVAC Control Module Replacement

If the auxiliary HVAC control module is replaced no additional procedures are necessary.

Auxiliary Actuator Replacement

If an auxiliary actuator is replaced, a Re-Calibration of the actuator is not necessary. The auxiliary HVAC control module knows the exact location of the door when the auxiliary HVAC system is turned on.