GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

The daytime running lamps (DRL) diode consists of a black aluminum case with fins. The diode attaches to the instrument panel (IP) harness behind the left side of the IP.

  1. Ensure that the ignition switch is in the OFF position.
  2. Ensure that the headlamp switch is in the OFF position.

  3. Object Number: 277249  Size: SH
  4. Remove the bolt that retains the DRL diode from the lower IP reinforcement.
  5. Disconnect the electrical connector.
  6. Remove the DRL diode from the vehicle.

Installation Procedure


    Object Number: 277249  Size: SH
  1. Connect the electrical connector.
  2. Install the DRL diode 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 bolt that retains the DRL diode to the lower IP reinforcement.
  5. Tighten
    Tighten the bolt to 8 N·m (71 lb in).