See also:

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 downlo ...

Turn and Lane-Change Signals
An arrow on the instrument panel cluster flashes in the direction of the turn or lane change. Move the turn signal lever all the way up or down to signal a turn. Raise or lower the lever until t ...

XM™ Satellite Radio Service
XM Satellite Radio Service gives digital radio reception from coast to coast in the 48 contiguous United States, and in Canada. Just as with FM, tall buildings or hills can interfere with sa ...