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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTHEADLIGHTSLIGHTING SYSTEMSREPAIR INSTRUCTIONSHEADLAMP REPLACEMENT (CHEVROLET)INSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
  1. Position the headlamp assembly to the headlamp panel.
  2. Index and seat the tabs on the park/turn socket (3) to the headlamp assembly.
  3. Index and seat the tabs on the side marker socket (4) to the headlamp assembly.
  4. Connect the headlamp electrical connector (2).
  5. Connect the headlamp leveling electrical connector to the motor/actuator if equipped.
  6. Align and install the 4 locator pins on the back of the headlamp assembly into the retaining tab holes.
  7. Push down on the retaining tabs (1) in order to lock the headlamp assembly into the headlamp panel.
  8. Install the grille. Refer to GRILLE REPLACEMENT (GMC)  or GRILLE REPLACEMENT (OLDSMOBILE)  or GRILLE REPLACEMENT (CHEVROLET)  in Exterior Trim.
  9. Close the hood.
    Fig 1: Installing Headlamp Assembly To Headlamp Panel
    G01640494Courtesy 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.