GM Service Manual Online
For 1990-2009 cars only

Delayed headlamp illumination provides a period of exterior lighting when leaving the vehicle. The feature is activated when the vehicle's ignition is turned off and the headlamps are on due to the automatic headlamp control feature described previously . The headlamps will remain on until the exterior lamps control is moved from OFF to the parking lamp position or until a 90 second lighting period has ended.

If the ignition is turned off while the exterior lamps control is in the parking lamp or headlamp position, the delayed headlamp illumination cycle will not occur.

This feature can be turned on or off by doing the following:

  1. Turn the ignition to RUN.
  2. Close all the doors.
  3. Press and hold LOCK on the power door lock switch. While holding LOCK on the door lock switch, cycle the exterior lamps control on and off two times.
  4. Release the power door LOCK switch. These steps must be carried out in a time period of less than 10 seconds, followed by a delay period of no more than 10 seconds.
  5. Then, press and hold the unlock position on the power door switch. While holding the unlock position, turn the exterior lamps control on and off two times. Release the unlock position on the power door switch. These operations must be carried out in a time period of less than 10 seconds.

After releasing the unlock position on the power door switch, a single chime will be heard if the delayed headlamp illumination function has been turned off. Two chimes will be heard if the feature has been turned on. Disconnecting the vehicle's battery for up to a year will not change the programmed operation for this feature.