GM Service Manual Online
For 1990-2009 cars only

Calibration Procedure with a Scan Tool

Use the following steps to perform the calibration update:

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, select Instrument Panel Module.
  4. Select Special Functions.
  5. Select Miscellaneous Test.
  6. Select Recalibrate all Motors.
  7. Select ON, wait 30 seconds.
  8. HVAC Door Calibrations will display Cal OK.

Calibration Procedure without a Scan Tool

  1. Turn OFF the ignition.
  2. Remove the battery positive voltage circuit fuse of the Instrument Panel Control Module.
  3. Important: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.

  4. Wait 60 seconds.
  5. Install the fuse.