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 403 (LIGHTING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCOURTESY LAMPS MALFUNCTIONCIRCUIT/SYSTEM TESTINGDOOR OPEN SWITCH MALFUNCTION
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Door Open Switch Malfunction
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Door Open Switch Malfunction
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the inoperative door latch assembly.
- Ignition OFF, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Door Open Switch parameter is Closed.
- If the not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the appropriate door control module.
- Install a 3A fused jumper wire between the signal circuit and ground. Verify the scan tool Door Open Switch parameter is Open.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the appropriate door control module.
- If all circuits test normal, test or replace the inoperative door latch assembly.
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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.