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 
to select recirculation;
press it again to select outside air.
See also:
Headphones
A. Battery cover
B. Channel 1 or 2 switch
C. Power button
D. Volume control
E. Power indicator light
The RSE includes two 2-channel wireless headphones that are dedicated to this system. Channe ...
Comprehensive safety system
The GMC Acadia has a comprehensive safety system that is designed to protect
passengers before, during and after a crash. Its strong structure and four-wheel
independent suspension system enhance ...
Key and Lock Messages
REPLACE BATTERY IN REMOTE KEY
This message displays if a Remote Keyless Entry (RKE) transmitter battery is low. The battery needs to be replaced in the transmitter.
See “Battery Replacement” und ...