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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1212 (SUNROOF SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER SUNROOF INOPERATIVECOMPONENT TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Component Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Component Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Sunroof Switch
- Ignition OFF, disconnect the harness connector at the sunroof switch.
- Test for infinite resistance between the switch terminals listed below and the ground circuit terminal 5 with the switch in the open position.
- Express open/close (Crew Cab) terminal 1
- Sunroof close terminal 4
- Sunroof open terminal 6
- Vent close (Crew Cab) terminal 8
- Vent open (Crew Cab) terminal 2
- If not the specified value, replace the sunroof switch.
- Test for less than 5 ohms between the switch terminals listed below and the ground circuit terminal 5 with the switch in the closed position.
- Express open/close (Crew Cab) terminal 1
- Sunroof close terminal 4
- Sunroof open terminal 6
- Vent close (Crew Cab) terminal 8
- Vent open (Crew Cab) terminal 2
- If greater than the specified value, replace the sunroof 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.