2008 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE

Sunroof Motor/Actuator Initialization/Teach Process



Sunroof Motor/Actuator Initialization/Teach Process

Perform the initialization/teach procedure any time:

* A new sunroof motor/actuator has been installed.
* The existing sunroof motor/actuator has been removed and reinstalled.
* The sunroof system has suffered 3 interruptions for emergency events, i.e. anti-pinch, debris in tracks etc., and normal operation is canceled.


By performing the initialization/teach procedure, the sunroof motor/actuator records the open vent stop position. The motor/actuator will then understand the other positions, closed and full open soft stop, and allow express and obstacle detection functions.

1. Ensure that all electrical harness connectors are connected.
2. Turn the ignition to ON.
3. Completely close the sunroof window with the manual close switch.
4. Press the sunroof vent switch to the vent open position until the sunroof window stops, and continue holding the switch for at least 10 seconds.

Important: The initialization/teach procedure is not complete if the battery and/or ignition power has been interrupted during the process.


The Initialization/Teach Process must be restarted if the procedure is not carried out completely.


5. Verify the operation of the sunroof in all positions.


Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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