GMC 2010 Yukon/Yukon XL Owner's Manual page 228

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.
more frequent wipes or down for less frequent wipes.
Slow wipes.
Fast wipes.
4-6
, then release.
longer.
Turn the band up for
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 Windshield Wiper Blade Replacement on
page 6 61.
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 your washer until
the windshield is warmed. Otherwise the washer
fluid can form ice on the windshield, blocking your
vision.
Push the paddle marked with
the windshield washer symbol at the top of the
multifunction lever, to spray washer fluid on the
windshield. The wipers clear the window and then
either stop or return to the preset speed.