Current position calibration is set incorrectly.

Vehicle is traveling at high speed.

Vehicle changes directions more than once, or when the vehicle is turning on a turn table in a parking lot.

Vehicle is entering and/or exiting a parking lot or a garage.

GPS signal is not received.

Roof carrier is installed on the vehicle.

Vehicle is being driven with tire chains.

Tires are replaced.

Tire pressure for the tires is incorrect.

Tires are worn.

First time the map DVD is inserted.

Battery is disconnected for several days.

Vehicle is driving in heavy traffic where driving is at low speeds, and the vehicle is stopped and started repeatedly.

See your dealer/retailer if other problems occur.

Problems with Route Guidance

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

You have not turned onto the road indicated.

Route guidance may not be available when using automatic rerouting for the next right or left turn.

The route may not be changed when using automatic rerouting.

There is no route guidance when turning at an intersection.

Plural names of places may be announced occasionally.

It may take a long time to operate automatic rerouting during high-speed driving.

Automatic rerouting may display a route returning to the set stopover if you are heading for a destination without passing through a set stopover.

The route prohibits the entry of a vehicle due to a regulation by time or season or any other regulation which may be given.

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Cadillac 2009 owner manual Problems with Route Guidance