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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEEXTERIOR BODY PANELSBODY REAR ENDREPAIR INSTRUCTIONSLIFT GATE CONTROL MODULE PROGRAMMING
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Lift Gate Control Module Programming

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Lift Gate Control Module Programming
  1. The liftgate module (LGM) must be programmed with the proper RPO configurations. The LGM stores the information regarding the vehicle options. If the LGM is not properly configured with the correct RPO codes the LGM will not control the features properly. Ensure that the following conditions exist in order to prepare for the LGM programming:
    • The battery is fully charged.
    • The ignition switch is in the RUN position.
    • The DLC is accessible.
  2. Follow the instructions on the Techline Terminal and scan tool to program the LGM.
  3. If the LGM fails to accept the program, perform the following steps:
    • Inspect all LGM connections.
    • Verify that the Techline Terminal and scan tool have the latest software version.

If the Liftgate module (LGM) has been replaced, you must also reprogram the key Fobs. Refer to TRANSMITTER PROGRAMMING .

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.