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Re-Calibrating Actuators (Auxiliary HVAC): Notes

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

When replacing the auxiliary HVAC control module it will be necessary to allow the auxiliary HVAC control module to perform a re-calibration process. When installing the auxiliary HVAC control module be sure to perform the following:

  1. Place the ignition switch to the OFF position.
  2. Disconnect the scan tool.
  3. Install the auxiliary HVAC control module.
  4. Re-connect all previously disconnected components.
  5. Place the ignition switch in the RUN position.
  6. Wait 40 seconds for the auxiliary HVAC control module to re-calibrate.
  7. Verify that no DTCs have set as current DTCs.

When replacing an auxiliary HVAC actuator it will be necessary to allow the auxiliary HVAC control module to perform a re-calibration process. When installing the auxiliary HVAC actuator be sure to perform one of the following:

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