GM Service Manual Online
For 1990-2009 cars only

For vehicles with headlamp washers, they clear debris from the headlamp lenses by soaking the lens with fluid, waiting for about five seconds, then rinsing away the loose debris.

The headlamp washers are located under the headlamps. The headlamp washers activate for one wash-wait-rinse cycle when the front windshield washer button is pressed for the first time after the vehicle is turned on. The headlamps washers then activate automatically for one cycle after every four front windshield washes.

The headlamps must be on to be washed. If the headlamps are off, only the front windshield will be washed.

The headlamp washers use the same fluid bottle as the windshield washer. However, the headlamp washers will run out of fluid before the windshield washer. If the windshield can be washed, but not the headlamps, check the fluid level. See Windshield Washer for more information.