GM Service Manual Online
For 1990-2009 cars only

High Mount Stop Lamp Replacement Pickup

Removal Procedure

  1. Ensure the headlamp switch is in the OFF position.

  2. Object Number: 348720  Size: SH
  3. Remove the high mounted stop lamp screws.
  4. Remove the high mounted stop lamp from the vehicle.
  5. Disconnect the electrical connector.

Installation Procedure


    Object Number: 348720  Size: SH
  1. Connect the electrical connector.
  2. Install the high mounted stop lamp to the vehicle.
  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.

  4. Install the high mounted stop lamp screws.
  5. Tighten
    Tighten the high mounted stop lamp screws to 2 N·m (17 lb in).

  6. Inspect the operation.

High Mount Stop Lamp Replacement Utility

Removal Procedure

  1. Ensure the headlamp switch is in the OFF position.
  2. Remove the upper garnish molding at the headliner. Refer to Rear Upper Garnish Molding Replacement in Interior Trim.
  3. Remove the right and left side rear window garnish molding.
  4. Lower the rear of the headliner in order to access the electrical connector.

  5. Object Number: 277175  Size: SH
  6. Disconnect the electrical connector (4).
  7. Attach a short piece of wire to the high mounted stop lamp connector in order to assist the guiding of the harness through the body.
  8. Remove the high mounted stop lamp screws (2).
  9. Remove the high mounted stop lamp (1) from the vehicle.

Installation Procedure

  1. Attach the harness to the guide wire.
  2. Using the guide wire, pull the lamp wire through the hole in the roof panel.
  3. Remove the guide wire.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 277175  Size: SH
  5. Install the high mounted stop lamp (1) to the vehicle with the screws (2).
  6. Tighten
    Tighten the screws to 2 N·m (17 lb in).

  7. Connect the electrical connector (4).
  8. Install the headliner.
  9. Install the left and right side rear window garnish molding.
  10. Install the rear upper garnish molding. Refer to Rear Upper Garnish Molding Replacement in Interior Trim.