GM Service Manual Online
For 1990-2009 cars only
WIPER : Turn the band marked WIPER to control the windshield wipers.

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 cycle. If you want more cycles, hold the band on MIST longer.

Delay: For delayed wiping cycles, 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 choose the delay time. The closer to LO, the shorter the delay time.

LO: For steady wiping cycles at low speed, turn the band away from you to the LO position.

HI: For high-speed wiping, turn the band away from you to the HI position.

OFF: To stop the wipers, turn the band to OFF.

Remember that damaged wiper blades may prevent you from seeing well enough to drive safely. To avoid damage, carefully clear ice and snow from the wiper blades before using them. If they are frozen to the windshield, carefully loosen or thaw them. If your blades do become damaged, get new blades or blade inserts.

Heavy snow or ice can overload your wipers. A circuit breaker will stop them until the motor cools. Clear away snow or ice to prevent an overload.