Heating, Ventilation, and Air Conditioning Control (HVAC) Module Programming

WARNING: This page is about a different car, the 2010 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

To program and setup an existing or new replacement HVAC module, perform the following procedure:

With a scan tool, access the Service Programming System (SPS) and follow the on-screen instructions. Refer to Service Programming System (SPS) .
On the SPS Supported Controllers screen, select ECC Remote Heater and Air Conditioning Control Module - Programming and follow the on-screen instructions.
On the SPS Supported Controllers screen, select ECC Remote Heater and Air Conditioning Control Module - Setup and follow the on-screen instructions.

If the HVAC module fails to accept the program, verify all scan tool and HVAC module connections are secure.

NOTE: After programming is completed, perform the following to avoid future misdiagnosis:

Turn the ignition OFF for 10 seconds.
Open and close the door.
Connect the scan tool to the data link connector.
Ignition ON, engine OFF.
With a scan tool, clear all DTC's from all modules.