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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1428 (SUNROOF SYSTEM)REPAIR INSTRUCTIONSSUNROOF MOTOR/ACTUATOR INITILIZATION/TEACH PROCESS (EXISTING MOTOR)
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Sunroof Motor/Actuator Initilization/Teach Process (Existing Motor)

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Sunroof Motor/Actuator Initilization/Teach Process (Existing Motor)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Initialization/Teach Procedure any time a new sunroof motor actuator is installed in the vehicle.

    Fig 1: Identifying Sunroof Motor/Actuator (New Style MD4)
    GM1542793Courtesy of GENERAL MOTORS CORP.
  1. Press and hold the open switch until the full open position.
  2. Release the switch.
  3. Press and hold the open switch for 10 seconds or more. The glass panel will move further rearward of the open position, stall at the hard stop, and move back slightly to the soft stop or full-open position.
  4. Release the switch
  5. Press and hold the open switch within 6 seconds.
  6. Hold the open switch until the glass panel moves to the closed position and stops.
  7. Release the switch.
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When to See a Mechanic

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

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