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 INSTRUCTIONSSUNROOF SUNSHADE PANEL 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: Removing/Installing Sunshade

Courtesy of GENERAL MOTORS CORP.

Position the sunshade to the vehicle from the top of the vehicle.
Install the retaining tabs on one side of the sunshade into the track slot of the sunroof.
Flex the center of the sunshade (2) upwards while simultaneously inserting the retaining tabs (3) into the track slot (1).
Ensure that the sunshade tabs are fully seated in the track slots, and the sunshade slides smoothly.

Fig 2: Identifying Water Trough-To-Sunroof Assembly Screws

Courtesy of GENERAL MOTORS CORP.

Install the water trough to the sunroof from the top of the vehicle.

NOTE: Refer toFastener Notice in Cautions and Notices.

Install the screws (1) that retain the water trough to the sunroof.
Tighten: Tighten the screws to 1 N.m (9 lb in).
Install the sunroof window. Refer to Sunroof Window Replacement .

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.