Test A: Power Seat Inoperative

2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 FSECTION Test A: Power Seat Inoperative
  1. 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.
  2. Disconnect 2-pin connector C307 (for driver's seat) or C306 (for passenger's seat). Connect a test light between ground and connector C306 or C307 terminal "A" (Orange wire). If test light illuminates, go to step  4 . If test light does not illuminate, go to next step.
  3. Repair open in Orange wire between connect C306 or C307 and instrument panel fuse block. See WIRING DIAGRAMS  . Go to step  7 .
  4. Reconnect connector C306 or C307. Disconnect suspect power seat switch harness connector. Check continuity between ground and power seat switch harness connector terminal "C" (Black wire). If continuity exists, go to step  6 . If continuity does not exist, go to next step.
  5. Repair open in Black wire between power seat switch and ground. See WIRING DIAGRAMS  . Go to step  7 .
  6. Replace suspect power seat switch. See POWER SEAT ADJUSTER SWITCH  under REMOVAL & INSTALLATION. Go to step  7 .
  7. 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.