See also:

Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's wa ...

Battery
The battery supplies power to start the engine and operate any additional electrical accessories. • To avoid break-down or failure to start the vehicle, maintain a battery with full cranking power. ...

Other Navigation Services Available from OnStar
OnStar eNav: Allows subscribers to send destinations from Google Maps™ and MapQuest.com to their Turn-by-Turn Navigation or screen-based navigation system. When ready, the directions will be dow ...