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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1417 (BODY REAR END)REPAIR INSTRUCTIONSLIFTGATE REPLACEMENTINSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Installing Liftgate Hinge Nuts
    GM721409Courtesy of GENERAL MOTORS CORP.
  1. Install the liftgate to the vehicle with the aid of an assistant.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the liftgate hinge nuts.

    Tighten:  Tighten the liftgate hinge nuts to 20 N.m (15 lb ft).

  3. Install the liftgate struts. Refer to Strut Replacement - Liftgate .
  4. Install the wire harness to the liftgate. Refer to Wiring Harness Replacement - Liftgate .
  5. Install the liftgate control module. Refer to Liftgate Control Module Replacement .
  6. Install the window wiper assembly. Refer to Washer Hose Replacement - Rear (TrailBlazer, Envoy) or Washer Hose Replacement - Rear (XUV) in Wipers/Washer Systems.
  7. Install the window latch assembly. Refer to Latch Replacement - Liftgate Window .
  8. Install the lock cylinder. Refer to Lock Cylinder Replacement - Liftgate .
  9. Install the license plate pocket. Refer to License Plate Pocket Replacement (Envoy XUV)  or License Plate Pocket Replacement (All Except Envoy XUV) .
    10. Fig 2: View Of Liftgate Window Handle Bolts And Defogger Grid Electrical Connectors
    GM698542Courtesy of GENERAL MOTORS CORP.
  10. Connect the rear windshield defogger electrical connectors (2).
  11. Connect the rear window washer fluid supply hose.
  12. Connect the CHMSL electrical connector behind the header panel.
    Fig 3: Identifying Wiring Harness Pass Through Boot To Liftgate
    GM749976Courtesy of GENERAL MOTORS CORP.
  13. Install the liftgate trim panel. Refer to Trim Panel Replacement - Liftgate (TrailBlazer, Envoy, Bravada)  or Trim Panel Replacement - Liftgate (TrailBlazer EXT, Envoy XL) .
  14. Install the liftgate window garnish molding. Refer to Garnish Molding Replacement - Rear Window in Interior Trim.
  15. Install the upper rear quarter trim, located above the tail lamp. Refer to Molding Replacement - Rear Panel in Exterior Trim.
  16. Install the liftgate window. Refer to Window Replacement - Liftgate .
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.