See also:

Starting the Engine
When first starting the vehicle, the engine idle speed will be elevated to allow the catalytic converter, an emissions control device, to quickly reach operating temperature. After approximat ...

IntelliBeam® Intelligent High-Beam Headlamp Control System
For vehicles with this feature, be sure to read this entire section before using it. IntelliBeam is an enhancement to the vehicle's headlamp system. Using a digital light sensor on the rearvie ...

TTY Users
OnStar has the ability to communicate to the deaf, hard–of–hearing, or speech–impaired customers while in the vehicle. The available dealer–installed TTY system can provide in-vehicle acces ...