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 MANUALSCHEVROLET2000CHEVY EXPRESS G3500, VAN CARGO EXTENDED, 6.5 FREPAIR AND DIAGNOSISBODY & FRAMESEATSPOWER SEAT SYSTEMSYSTEM TESTSTEST C: POWER SEAT DOES NOT MOVE VERTICALLY
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 F
Test C: Power Seat Does Not Move Vertically
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 FSECTION Test C: Power Seat Does Not Move Vertically
- If power seat system check has been performed, go to next step. If power seat system check has not been performed, go to POWER SEAT SYSTEM CHECK under TROUBLE SHOOTING.
- Disconnect suspect power seat switch harness connector. Connect a fused jumper wire between battery positive and power seat switch harness connector terminal "A" (Light Blue wire). Connect another fused jumper wire between ground and power seat switch harness connector terminal "C" (Black wire). Rear of seat should move down. Move jumper wire from terminal "A" to terminal "B" (Yellow wire). Rear of seat should move up. If seat moves as specified, go to next step. If seat does not move as specified, go to step 4 .
- Replace suspect power seat switch. See POWER SEAT ADJUSTER SWITCH under REMOVAL & INSTALLATION. Go to step 8 .
- Check continuity between suspect power seat switch harness connector terminals "A" (Light Blue wire) and "B" (Yellow wire). If continuity exists, go to step 7 . If continuity does not exist, go to next step.
- Disconnect suspect power seat motor harness connector. Check continuity between power seat motor connector (motor side) terminals "A" (Red wire) and "B" (Black wire). If continuity exists, go to next step. If continuity does not exist, go to step 7 .
- Repair open in Light Blue or Yellow wire between power seat switch and power seat motor. Go to step 8 .
- Replace power seat motor. See ADJUSTER MOTORS & DRIVE CABLES under REMOVAL & INSTALLATION. Go to next step.
- Retest system. See POWER SEAT SYSTEM CHECK under TROUBLE SHOOTING. If symptom still exists, go to step 2 . If symptom does not exist, system is okay.
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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.