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 602 (FIXED AND MOVEABLE WINDOWS SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER WINDOWS MALFUNCTIONCOMPONENT TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Component Testing
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Component Testing
WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Passenger Window Switch
- Ignition OFF, disconnect the harness connector at the appropriate passenger window switch.
- Test for infinite resistance between the signal terminals 1, 2 and 3 and the low reference terminal 4 with the switch in the inactive position.
- If not the specified value, replace the passenger window switch.
- Test for less than 2 ohms between the signal terminal 2 and the low reference terminal 4 with the switch in the up position.
- If greater than the specified range, replace the passenger window switch.
- Test for less than 2 ohms between the signal terminal 1 and the low reference terminal 4 with the switch in the down position.
- If greater than the specified range, replace the passenger window switch.
- Test for less than 2 ohms between the signal terminal 3 and the low reference terminal 4 with the switch in the express down position.
- If greater than the specified range, replace the passenger window 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.