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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 821 (ROOF)REPAIR INSTRUCTIONSSUNROOF MODULE ASSEMBLY REPLACEMENTINSTALLATION PROCEDURE

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Installation Procedure

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Sunroof Module Assembly

Courtesy of GENERAL MOTORS CORP.

With an assistant, position the new sunroof module assembly into the roof opening.
Install the bolts which secure the sunroof module assembly to the roof and tighten the bolts by hand.
Place a 12 mm (0.47 in) pin into the sunroof module alignment holes.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Remove the alignment pins.
Tighten: Tighten the bolts to 9 N.m (80 lb in).
Install the front and rear sunroof drain hoses. Refer to Sunroof Drain Hose Replacement - Front and Sunroof Drain Hose Replacement - Rear .
Connect the electrical connectors to the sunroof module.
Secure the harness to the sunroof module.
Adjust the sunroof window. Refer to Sunroof Window Height and Opening Fit Adjustment .
Verify the proper operation of the sunroof before securing the headliner.
With an assistant, install the headliner. Refer to Headliner Replacement in Interior Trim.

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.