2008 GMC Acadia Owner's Manual - Page 172

Driver's Side Temperature Control The driver side temperature buttons are used to adjust the temperature of the air coming through the system on the driver side. The temperature can be adjusted even if the system is turned off. This is possible since outside air will always flow through the system as the vehicle is moving forward unless it is set to recirculation mode. See "Recirculation" later in this section. Press the + or − buttons to increase or decrease the temperature. The driver side temperature display will show the temperature setting decreasing or increasing. When the passenger's temperature setting is set different than the driver's setting, the indicator on the PASS button comes on and both the driver side and passenger side temperature displays are shown. Automatic Operation AUTO (Automatic): When automatic operation is active the system controls the inside temperature, the air delivery, and the fan speed. Use the steps below to place the entire system in automatic mode: 1. Press the AUTO button. When AUTO is selected, the display shows the current temperature(s) selected and AUTO is on the display. The current delivery mode and fan speed also display for approximately 5 seconds. When AUTO is selected, the air conditioning operation and air inlet are automatically controlled. The air conditioning compressor runs when the outside temperature is over about 40°F (4°C). The air inlet is normally set to outside air. If it is hot outside, the air inlet can automatically switch to recirculate inside air to help quickly cool down your vehicle. The light comes on the recirculation button while in recirculation. Passenger's Side Temperature Control The passenger's temperature buttons can be used to change the temperature of the air coming through the system on the passenger side of the vehicle. The temperature can be adjusted even if the system is turned off. This is possible since outside air will always flow through the system as the vehicle is moving forward unless it is set to recirculation mode. See "Recirculation" later in this section. Press the + or − buttons to increase or decrease the temperature. The passenger side display will show the temperature setting decreasing or increasing. The passenger's temperature setting can be set to match the driver's temperature setting by pressing the PASS button and turning off the PASS indicator. 3-30