GM Service Manual Online
For 1990-2009 cars only

Headlamp Bulb Replacement Base

Removal Procedure

  1. Make sure the headlamp switch is in the OFF position.
  2. Caution: Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments. To help avoid personal injury:

       • Turn off the lamp switch and allow the bulb to cool before changing the bulb.
       • Leave the lamp switch OFF until the bulb change is complete.
       • Always wear eye protection when changing a halogen bulb.
       • Handle the bulb only by its base. Avoid touching the glass.
       • Keep dirt and moisture off the bulb.
       • Properly dispose of the used bulb.
       • Keep halogen bulbs out of the reach of children.

    Notice: Avoid touching the bulb or letting the bulb come in contact with anything damp. Oil from your skin or moisture on the bulb can cause the bulb to explode when the bulb is turned on. If either comes in contact with the bulb, clean the bulb with alcohol or a suitable degreaser and wipe the bulb dry.

  3. Remove the bulbs from the headlamp capsules by reaching from the engine compartment and by twisting the bulb counterclockwise.

  4. Object Number: 277176  Size: SH
  5. Remove the 2 long screws from the top of the radiator support.

  6. Object Number: 277177  Size: SH
  7. Pull forward the headlamp assembly (3).
  8. Disconnect the electrical connector (2) from the burned out bulb assembly (1).

Installation Procedure


    Object Number: 277177  Size: SH

    Important: 

       • Replace a high beam bulb with another high beam bulb. The high beam bulb has a red gasket.
       • Replace a low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a yellow gasket at the base.

  1. Install the new bulb assembly (1) into the headlamp assembly (3).
  2. Twist clockwise the bulb assembly.

  3. Seat the bulb assembly with the connector facing down.
  4. Connect the electrical connector (2) to the bulb assembly.
  5. Install the headlamp assembly.

  6. Object Number: 277176  Size: SH
  7. Install the 2 long screws through the top of the radiator support.
  8. Tighten the screws.

Headlamp Bulb Replacement Luxury

Removal Procedure

  1. Make sure the headlamp switch is in the OFF position.
  2. Caution: Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments. To help avoid personal injury:

       • Turn off the lamp switch and allow the bulb to cool before changing the bulb.
       • Leave the lamp switch OFF until the bulb change is complete.
       • Always wear eye protection when changing a halogen bulb.
       • Handle the bulb only by its base. Avoid touching the glass.
       • Keep dirt and moisture off the bulb.
       • Properly dispose of the used bulb.
       • Keep halogen bulbs out of the reach of children.

    Notice: Avoid touching the bulb or letting the bulb come in contact with anything damp. Oil from your skin or moisture on the bulb can cause the bulb to explode when the bulb is turned on. If either comes in contact with the bulb, clean the bulb with alcohol or a suitable degreaser and wipe the bulb dry.

  3. Remove the park/turn signal lamp assembly. Refer to Parking and Turn Signal Lamp Replacement .
  4. Remove the headlamp assembly pins from the top of the radiator support.

  5. Object Number: 277177  Size: SH
  6. Pull forward the headlamp from the assembly .
  7. Disconnect the electrical connector (2)  from the burned out bulb assembly (1).
  8. Remove the bulb from the rear of the headlamp.

Installation Procedure


    Object Number: 277177  Size: SH

    Important: 

       • Replace a high beam bulb with another high beam bulb. The high beam bulb has a red gasket.
       • Replace a low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a yellow gasket at the base.

  1. Install the new bulb assembly into the headlamp assembly.
  2. Twist clockwise the bulb assembly.

  3. Seat the bulb assembly with the connector facing down.
  4. Connect the electrical connector (2) to the bulb assembly (1).
  5. Install the headlamp assembly. Refer to Headlamp Replacement .
  6. 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.

  7. Install the headlamp assembly pins.
  8. Tighten
    Tighten the assembly pins to 5 N·m (44 lb in).

  9. Install the park/turn signal lamp assembly. Refer to Parking and Turn Signal Lamp Replacement