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 G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1289 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER SEAT INOPERATIVECIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the driver seat adjuster switch.
- Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal and ground for the driver seat adjuster listed below:
- RPO ASN ground circuit terminal A
- RPO AG1 ground circuit terminal B
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal and ground for the driver seat adjuster listed below:
- RPO ASN B+ circuit terminal F
- RPO AG1 B+ circuit terminal D
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, connect the harness connector at the driver seat adjuster switch and disconnect the harness connector at the appropriate seat motor.
- Ignition OFF, test for less than 1 ohm of resistance between the control circuit terminal A and ground.
- If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver seat adjuster switch.
- Ignition OFF, test for less than 1 ohm of resistance between the control circuit terminal B and ground.
- If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver seat adjuster switch.
- Connect a test lamp between control circuit terminal A and control circuit terminal B.
- Ignition ON, command the appropriate seat motor in both directions using the driver seat adjuster switch. The test lamp should illuminate when commanding the each direction.
- If the test lamp does not illuminate during either of the commands, test both control circuits for a short to ground. If the circuits test normal, test or replace the driver seat adjuster switch.
- If all circuits tests normal, test or replace the appropriate seat motor.
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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.