See also:

Dual Automatic Climate Control System
The heating, cooling, and ventilation for the vehicle can be controlled with this system. For vehicles with the remote start feature and it is activated, the climate control system heats or cools ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...

Programming without a Recognized Transmitter (Keyless Access Vehicles Only)
If there are no currently recognized transmitters available, follow this procedure to program up to five transmitters. This feature is not available in Canada. This procedure will take approximate ...