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 HVAC control module or HVAC actuators.

HVAC Control Module Replacement

If the HVAC control module is replaced, an automatic re-calibration of all the actuators will occur. No additional procedures are necessary.

HVAC Control Module Reprogramming

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) .

Actuator Replacement

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

Re-Calibrating Actuators--Refer to Actuator Recalibration .