2004 Buick Regal Owner's Manual - Page 118

Dual Automatic Climate Control System The vehicle may have this climate control system. The heating, cooling and ventilation can be controlled with it. 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 (16°C) and 89°F (31°C). 1. Adjust the temperature to a comfortable setting. 3-20