Calibration Procedure with a Scan Tool
Use the following steps to perform the calibration update:
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- With a scan tool, select HVAC Systems Automatic.
- Select Special Functions.
- Select HVAC.
- Select Calibrate HVAC Module.
- Select ON, wait 30 seconds.
Calibration Procedure without a Scan Tool
- Turn OFF the ignition.
- Remove the battery positive voltage circuit fuse of the HVAC control
module.
Important: The module memory will not clear if the battery positive voltage circuit fuse
is installed in less than 60 seconds.
- Wait 60 seconds.
- Install the fuse.