GM Service Manual Online
For 1990-2009 cars only
(Windshield Wipers): To use the windshield wipers, turn the band with the wiper symbol on it.

(Mist): For a single wiping cycle, turn the band to mist. Hold it there until the wipers start. Then let go. The wipers will stop after one wipe. If you want more wipes, hold the band on mist longer.

Delayed Wipers: You can set the wiper speed for a long or short delay between wipes. This can be very useful in light rain or snow. Turn the band to one of the dashed marks on the lever to choose the delay time. The closer to the top of the lever, the shorter the delay.

(Low Speed): For steady wiping at low speed, turn the band away from you to the first solid band past the delay settings.

(High Speed):  For high-speed wiping, turn the band further, to the second solid band past the delay settings.

(Off) : Turn the band to this symbol to turn off your windshield wipers.