GMC 2010 Sierra 1500 Crew Cab Owner's Manual page 230

Turn the band with the wiper symbol to control the
windshield wipers.
Single wipe, turn to
Several wipes, hold the band on
Turns the windshield wipers off.
4-6
, then release.
longer.
more frequent wipes or down for less frequent wipes.
Slow wipes.
Fast 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
.
Heavy snow or ice can overload the wiper motor.
A circuit breaker will stop the motor until it cools down.
Turn the band up for