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 HVAC actuators.

Auxiliary HVAC Control Module Replacement

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

Auxiliary HVAC Control Module Reprogramming

Do not reprogram the auxiliary HVAC control module unless directed by a service procedure or a service bulletin.

Reprogram HVAC Control Module--Refer to Service Programming System (SPS) .

Actuator Replacement

If an actuator is replaced, the following procedure must be performed

Re-Calibrating Actuators--Refer to Actuator Recalibration in HVAC Systems - Automatic.