2008 GMC Acadia Owner's Manual - Page 173

2. Set the driver's and passenger's temperature. To find your comfort setting, start with a 73°F (22°C) temperature setting and allow about 20 minutes for the system to regulate. Use the driver's or passenger's temperature buttons to adjust the temperature setting as necessary. If you choose the temperature setting of 60°F (15°C), the system remains at the maximum cooling setting. If you choose the temperature setting of 90°F (32°C), the system remains at the maximum heat setting. Choosing either maximum setting will not cause the vehicle to heat or cool any faster. Do not cover the solar sensor located on the top of the instrument panel near the windshield. This sensor regulates air temperature based on sun load and also turns on your vehicle's headlamps. For more information on the solar sensor, see "Sensors" later in this section. To avoid blowing cold air in cold weather, the system delays turning on the fan until warm air is available. The length of delay depends on the engine coolant temperature. Press the fan switch to override this delay and change the fan to a selected speed. If you adjust the air delivery mode or temperature settings with the system off, the display comes on briefly to show the settings and then turns off. Press the on/off button or the up down arrows on the fan switch, the defrost button, AUTO button, or the air conditioning button to turn the system on when it is off. Manual Operation The air delivery mode or fan speed can be manually adjusted. DC (Fan): The buttons with the fan symbols let you manually adjust the fan speed. Press the up arrow to increase fan speed and the down arrow to decrease fan speed. Pressing a fan button while the system is off will turn the system on. Pressing a fan button while in automatic control places the fan under manual control. The fan setting remains displayed, the word AUTO is no longer displayed, and the AUTO button indicator light turns off. The air delivery mode remains in automatic control. O(On/Off): Press this button to turn off the climate control system. Outside air still enters the vehicle, and is directed to the floor. This direction can be changed by pressing the mode button. Recirculation can only be selected in vent or bi-level mode. The temperature can also be adjusted using either temperature button. yN z(Mode): Press the mode up and down buttons to manually change the direction of the airflow in the vehicle. Repeatedly press the button until the desired mode appears on the display. Pressing a mode button while the system is off will change air delivery mode without turning the system on. Pressing one of these buttons while in automatic control to place the mode under manual control. 3-31