2009 Buick LaCrosse Owner's Manual - Page 147

Dual Automatic Climate Control System With this system the heating, cooling, and ventilation can be controlled. Automatic Operation AUTO (Automatic): Press the AUTO button for automatic control of the inside temperature, the air delivery mode, and the fan speed. There might be a delay of two to three minutes before the fan comes on when the automatic operation is used in cold weather. For the automatic system to function, the temperature must be set between 61°F (15°C) and 89°F (32°C). 1. Adjust the temperature to a comfortable setting. 2. Press the PASS button or the y or z on the passenger side to turn the passenger temperature set on and off. When turned on, the passenger temperature will be the same as the driver setting. Press y or z on passenger side to adjust the passenger temperature setting. When the passenger's temperature set is off, the passenger display will be off and the driver's set temperature will be for the driver and passenger. In cold weather, the system will start at reduced fan speeds to avoid blowing cold air into the vehicle until warmer air is available. The system will start out blowing air at the floor but may change modes automatically as the vehicle warms up to maintain the chosen temperature setting. The length of time needed for warm up will depend on the outside temperature and the length of time that has elapsed since the vehicle was last driven. 3-25 A. B. C. D. E. F. G. AUTO OFF Fan Control Display Air Conditioning Recirculation PASS H. Heated Seats I. Rear Window Defogger J. Air Delivery Mode Controls K. Defrost