Automatic Operation

The system automatically controls the fan speed, air delivery, air conditioning, and recirculation to heat or cool the vehicle to the selected temperature.

When the AUTO indicator light is on, the system is in full automatic operation.

To place the system in automatic mode:

1. Press AUTO.

2. Set the temperature. Allow the system time to stabilize. Then adjust the temperature as needed.

To improve fuel efficiency and to cool the vehicle faster, recirculation may be automatically selected in warm weather. The recirculation light will not come on. Press the press it again to select outside air. to select recirculation; press it again to select outside air.

    See also:

    Spacious, refined interior
    Interior space is roomier - including increased cargo capacity - and has a spacious, luxurious environment, thanks to a premium two-tone color scheme and a lower-positioned instrument panel. New t ...

    Instantaneous Economy and Active Fuel Managementâ„¢ Indicator
    If the vehicle has this display, press the trip/fuel button until INST ECON V8 displays. This display shows the current fuel economy at a particular moment and will change frequently as driving condit ...

    Going & Stopping
    The biggest drawback I found with the Yukon was the powertrain. A 380-horsepower, 6.2-liter V-8 is standard in the Denali, but it was sluggish in almost every passing situation I could simulate. T ...