GM Service Manual Online
For 1990-2009 cars only

Inappropriate route guidance may occur under one of the following conditions:

    • When not turning onto the road indicated by the system.
    • When route guidance is not available for the next right or left turn.
    • When the route is not changed during automatic rerouting.
    • When turning at an intersection, there is no route guidance.
    • When plural names of places are displayed.
    • When driving at high speeds, it may take a long time for automatic rerouting to operate.
    • When you are heading for a destination without passing through a set waypoint, automatic rerouting may display a route returning to the set waypoint.
    • When the route prohibits the entry of a vehicle due to a regulation by time or season or any other regulation which may be given.
    • When a route cannot be found.
    • When a road is new, recently changed or is not listed on the CD, the route to the destination may not be shown. See "Ordering Regional Map Compact Discs" following.

To relocate the vehicle position on the map, see "Adjust Position" under Screen Setup .