GMC Sierra Owners Manual
The front wiper control is located on the turn and lane-change lever.
The windshield wipers are controlled by turning the band with on it.
(Off): Turns the windshield wipers off.
Turn the band up for more frequent wipes or down for less frequent wipes.
Clear ice and snow from the wiper blades before using them. If frozen to the windshield, carefully loosen or thaw them. Damaged wiper blades should be replaced. See Wiper Blade Replacement on page 10‑39.
Heavy snow or ice can overload the wiper motor. A circuit breaker will stop the motor until it cools down.
In freezing weather, do not use the washer until the windshield is warmed. Otherwise the washer fluid can form ice on the windshield, blocking your vision.