GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 64644  Size: SH
  1. Open the hood.
  2. Disconnect the negative battery cable. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    in General Information.
  3. Raise the appropriate headlamp manually.
  4. Turn the manual headlamp control knob counterclockwise.

  5. Disconnect the headlamp wiring harness electrical connector from the forward lamp wiring harness.

  6. Object Number: 64648  Size: SH
  7. Remove the headlamp bezel. Refer to Headlamp Bezel Replacement .
  8. Remove the front fascia lower closeout panel. Refer to Front Fascia Lower Close Out Panel in Bumpers and Fascias.
  9. Remove the brake caliper cooling duct. Refer to Front Fascia, Brake Air Inlet Duct in Bumpers and Fascias.
  10. Disconnect the electrical connectors from the headlamp automatic control module (RH side only).

  11. Object Number: 64649  Size: SH

    Important: Before removing the fasteners, be sure to support the headlamp assembly.

  12. Remove the two bolts mounting the headlamp bracket to the frame rail.

  13. Object Number: 64650  Size: SH
  14. Remove the three nuts mounting the headlamp bracket to headlamp stud plate.
  15. Carefully lift the headlamp assembly out of the vehicle.
  16. The headlamp assembly will have to clear the studs extending from headlamp stud plate.

  17. Transfer parts as necessary.

Installation Procedure


    Object Number: 64650  Size: SH
  1. Use care in positioning the headlamp assembly into the vehicle.
  2. Mount the headlamp assembly onto the studs extending from the headlamp stud plate.

  3. Loosely install the three nuts mounting the headlamp bracket to the headlamp stud plate.

  4. Object Number: 64649  Size: SH
  5. Loosely install the two bolts mounting the headlamp bracket to the frame rail.
  6. Beginning with the upper location, tighten the two bolts mounting the headlamp bracket to the frame rail.
  7. Tighten
    Tighten the headlamp bracket mounting bolts to 20 N·m (15 lb ft).

    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.

  8. Beginning with the upper inner location, tighten the nuts mounting the headlamp bracket to the headlamp stud plate.
  9. Tighten
    Tighten the headlamp bracket mounting nuts to 10 N·m (89 lb in).


    Object Number: 64648  Size: SH
  10. Connect the electrical connectors to the headlamp automatic control module (RH side).
  11. Install the brake caliper cooling duct. Refer to Front Fascia, Brake Air Inlet Duct in Bumpers and Fascias.
  12. Install the front fascia lower closeout panel. Refer to Front Fascia Lower Close Out Panel in Bumpers and Fascias.
  13. Install the headlamp bezel. Refer to Headlamp Bezel Replacement .

  14. Object Number: 64644  Size: SH
  15. Connect the headlamp wiring harness electrical connector to the forward lamp wiring harness.
  16. Lower the headlamps manually to ensure no binding exists.
  17. Turn the manual headlamp control knob clockwise.

  18. Connect the negative battery cable.
  19. Tighten
    Tighten the negative battery cable bolt to 15 N·m (11 lb ft).

  20. Close the hood.
  21. Check the alignment of the headlamp opening door. For adjustment procedures, refer to Headlamp Opening Door Adjustment .
  22. Check headlamp aim.
  23. • To check the aim of the headlamps using the screen method, refer to Headlamp Aiming .
    • To check the aim of the headlamps using the mechanical method, refer to Headlamp Aiming .