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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 475 (SUNROOF SYSTEM)REPAIR INSTRUCTIONSSUNROOF WIRING HARNESS REPLACEMENTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Important:  Note the following locations:

  • The position of the wire harness routing
  • The location of the tie-straps that secure the wire harness to the drive cable tube and the sunroof module.
  1. Position the sunshade in the full forward position.
  2. Remove the headliner. Refer to HEADLINER REPLACEMENT (AZTEK) or HEADLINER REPLACEMENT (RENDEZVOUS) .
  3. Cut the nylon tie straps on the sunroof control module and the drive cable tube.
    Fig 1: Cutting Nylon Tie Straps On Sunroof Control Module And Drive Cable Tube
    G01516260Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the electrical connectors from the following components:
    • The sunroof control switch
    • The sunroof control module
    • The sunroof actuator
    • The sunroof opening position switch
    • The body connector
  5. Remove the tape holding the wire harness to the sunroof module.
  6. Remove the wire harness from the sunroof.
    Fig 2: Removing Wire Harness From Sunroof
    G01516261Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.