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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISBODY & FRAMEWINDOWSPOWER WINDOW SYSTEMSYSTEM TESTSTEST B: LEFT WINDOW INOPERATIVECHEVY EXPRESS & SAVANA
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Chevy Express & Savana

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Chevy Express & Savana
  1. Disconnect master window switch assembly connector. Disconnect left window motor connector. Connect an ohmmeter between master window switch assembly terminal "E" and left window motor connector terminal "A" (Dark Blue wire). See Figure . If continuity exists, go to next step. If continuity does not exist, go to step  8 .
  2. Connect an ohmmeter between master window switch assembly connector terminal "A" and left window motor connector terminal "B" (Brown wire). If continuity exists, go to next step. If continuity does not exist, go to step  9 .
  3. Connect an ohmmeter between master window switch assembly terminals "E" and "G" (component side). If continuity exists, go to next step. If continuity does not exist, go to step  10 .
  4. Connect an ohmmeter between master window switch assembly terminals "A" and "G" (component side). If continuity exists, go to next step. If continuity does not exist, go to step  10 .
  5. Connect a test light between ground and master window switch assembly connector terminal "H" (Yellow wire). See Figure . Turn ignition switch to ACC position. If test light illuminates, go to next step. If test light does not illuminate, go to step  11 .
  6. Connect master window switch assembly connector. Connect a test light between ground and left window motor connector terminal "A" (Dark Blue wire). Press left window switch on master window switch assembly to UP position. If test light illuminates, go to next step. If test light does not illuminate, go to step  10 .
  7. Connect a test light between ground and left window motor connector terminal "B" (Brown wire). Press left window switch on master window switch assembly to DOWN position. If test light illuminates go to step  12 . If test light does not illuminate, go to step  10 .
  8. Repair open in Dark Blue wire between master window switch assembly connector terminal "E" and left window motor connector "A". See WIRING DIAGRAMS  .
  9. Repair open in Brown wire between master window switch assembly connector terminal "A" and left window motor connector terminal "B". See WIRING DIAGRAMS  .
  10. Replace master window switch assembly. See WINDOW SWITCH  under REMOVAL & INSTALLATION.
  11. Repair open in Yellow wire between master window switch assembly connector terminal "H" and splice S229. See WIRING DIAGRAMS  .
  12. If no mechanical problems or binding exists in operation of window regulator, replace left window motor. See WINDOW MOTOR  under REMOVAL & INSTALLATION.
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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.