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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISBODY & FRAMEWINDOWSPOWER WINDOW SYSTEMSYSTEM TESTSTEST A: ALL WINDOWS INOPERATIVEASTRO & SAFARI
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Astro & Safari

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Astro & Safari
  1. Disconnect master window switch assembly connector. Turn ignition switch to RUN position. Connect a test light between ground and master window switch assembly connector C1 terminal "L" (Yellow wire). See Fig 1 . If test light illuminates, go to next step. If test light does not illuminate, repair open in Yellow wire between master window switch assembly connector and instrument panel fuse block. See WIRING DIAGRAMS  .
  2. Connect a test light between master window switch assembly connector C1 terminal "L" (Yellow wire) and master window switch assembly connector C2 terminal "C" (Black wire). See Fig 2 . If test light illuminates, replace master window switch assembly. If test light does not illuminate, repair open in Black wire between master window switch assembly connector C2 terminal "C" and ground. See WIRING DIAGRAMS  . Retest system.
Fig 1: Identifying Left Window Switch Connector C1 & Right Window Switch Connector C2 Terminals (Astro & Safari)
G99C02298Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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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.