GM Service Manual Online
For 1990-2009 cars only

This feature activates the headlamps and parking lamps after the windshield wipers have been in use for approximately 15 seconds and deactivates and returns to ambient lighting conditions 15 seconds after the wipers are turned off.

If the exterior lamp control has been turned off or is in the parking lamp position while the wiper control is active in any position, the HEADLAMPS SUGGESTED message appears on the Driver Information Center (DIC). See DIC Warnings and Messages .

When the ignition is turned off, the wiper-activated headlamps will immediately turn off.