Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1428 (SUNROOF SYSTEM)REPAIR INSTRUCTIONSMOVEABLE ROOF PANEL CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure

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.

Fig 1: Locating Moveable Roof Panel Control Module Retainer

Courtesy of GENERAL MOTORS CORP.

Install the tabs located on the bottom of the control module into the keyhole slots of the moveable roof panel assembly.
Slide the control module away from the motor/actuator assembly, ensuring the tabs on the bottom of the control module remain in the keyhole slots.
Slide the control module away from the motor/actuator assembly until the retainer (1) is fully engaged.
Connect the electrical connectors (2) to the control module.
Install the moveable roof panel actuator cover. Refer to Moveable Roof Panel Actuator Cover Replacement .
Install the moveable roof panel. Refer to Moveable Roof Panel Assembly Replacement .
Perform a moveable roof panel learn cycle, by depressing the holding the roof switch in the forward position until the roof panel is fully opened, then depressing and holding the roof switch in the rearward position until the roof panel is fully closed.
Ensure the proper operation of the moveable roof panel and end gate window.

RENDER: 1.0x

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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.