GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2005 🢒 H2 🢒 Body 🢒 Lighting Systems 🢒 High Mount Stop Lamp Replacement

High Mount Stop Lamp Replacement SUV

Removal Procedure
  1. Remove the liftgate trim panel. Refer to Liftgate Trim Panel Replacement in Body Rear End.

    2. Object Number: 803121 Size: SH
  2. Disconnect the electrical connector from the high mounted stop lamp.
  3. Remove the retaining screws.
  4. Remove the grommet from the liftgate.
  5. Remove the lamp, with the attached harness, from the vehicle.

Installation Procedure
  1. Install the lamp, with the attached harness, to the vehicle.

    2. Object Number: 803121 Size: SH
  2. Install the grommet to the liftgate.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the retaining screws.

    4. Tighten
    Tighten the screws to 3 N·m (26 lb in).

  4. Connect the electrical connector to the high mounted stop lamp.
  5. Install the liftgate trim panel. Refer to Liftgate Trim Panel Replacement in Body Rear End.

High Mount Stop Lamp Replacement SUT

Removal Procedure

    Object Number: 1477816 Size: SH
  1. Carefully lower the rear headliner in order to access the electrical connector.
  2. Disconnect the electrical connector from the center high mounted stop lamp (CHMSL).
  3. Remove the 2 screws securing the CHMSL to the exterior rear header garnish molding.
  4. Disconnect the electrical harness grommet from the rear header.
  5. Remove the CHMSL and attached electrical harness.
  6. Remove the foam gasket and discard if damaged.

Installation Procedure

    Object Number: 1477816 Size: SH
  1. Install a new foam gasket.
  2. Install the lamp, with the attached harness, to the rear header.
  3. Secure the electrical harness grommet to the rear header.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the retaining screws.

    5. Tighten
    Tighten the screws to 3 N·m (26 lb in).

  5. Connect the electrical connector for the CHMSL to the headliner harness.
  6. Re-secure the rear of the headliner.