Air Conditioning
A/C (Air Conditioning): Press to turn the air conditioning on or off. If the fan is turned off or the outside temperature falls below freezing, the air conditioning will not work. When in AUTO, the air conditioning will come on automatically as needed.
(Recirculation): Press to turn on
the recirculation. Press to alternate between recirculation and outside air, if
the vehicle does not have a separate outside air button.
The indicator light turns on when recirculation is selected. Air is recirculated inside the vehicle. It helps quickly cool the air inside the vehicle or prevent outside air and odors from entering.
(Outside Air, If Equipped): Press
to turn on the outside air. An indicator light comes on. Outside air is circulated
throughout the vehicle.
See also:
Automatic Operation
AUTO (Automatic): The system automatically controls the inside temperature, the air delivery, and the fan speed.
To use automatic mode:
1. Press the AUTO button.
When AUTO is selected, the current ...
Under the Hood
The Yukon is available with either rear- or four-wheel drive. The Yukon
Denali can have an all-wheel-drive system that's distinct from the available
part-time four-wheel drive on the regular Yukon ...
Hazard Warning Flashers
(Hazard Warning Flashers):
Press this button located on top of the steering column, to make the front and rear turn signal lamps flash on and off. This warns others that you are having trouble. Pr ...