Air Quality Sensor
For vehicles with an air quality sensor, the climate control system adjusts to limit some exhaust fumes from being pulled inside your vehicle.
Press the AUTO button on the climate control to activate the air quality sensor. The recirculation indicator light comes on when poor quality air is detected. The air quality sensor will not maintain recirculation for an extended period to prevent the air inside the vehicle from becoming too dry or stuffy.
Under certain conditions, the air
quality sensor will not activate,
such as during cold weather or
with extreme odors. Press 
to
activate recirculation.
The air quality sensor system does not protect against carbon monoxide (CO), which you cannot see or smell. See Engine Exhaust.
See also:
Storing Button Memory Positions
To save positions into Button Memory:
1. Adjust the driver seat, seatback recliner, both outside mirrors, and
adjustable pedals, if available, to the desired driving positions.
2. Press and hold ...
Voice Recognition
The navigation system's voice recognition allows for hands-free operation of
the navigation system, audio system, and OnStar (if equipped) features.
Voice recognition can be used when the ignit ...
XM Messages
XL (Explicit Language
Channels): These channels,
or any others, can be blocked at a
customer's request, by calling
1-800-929-2100 in the U.S. and
1-877-438-9677 in Canada.
XM Updating: The ...