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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 289 (SUNROOF SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER SUNROOF INOPERATIVECIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Verification
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- With the sunroof in the closed position, press the sunroof open switch. The sunroof should open.
- If the sunroof does not open, refer to Power Sunroof Malfunction in Circuit/System Testing .
- With the sunroof in the open position, press the sunroof close switch. The sunroof should close.
- If the sunroof does not close, refer to Power Sunroof Malfunction in Circuit/System Testing .
- With the sunroof in the closed position, operate the sunroof express open feature. The sunroof should fully open.
- If the express open feature does not function, refer to Power Sunroof Express Feature Malfunction in Circuit/System Testing .
- With the sunroof in the open position, operate the sunroof express close feature. The sunroof should fully close.
- If the express close feature does not function, refer to Power Sunroof Express Feature Malfunction in Circuit/System Testing .
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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.