Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Driving to Your Destination
This section describes how to follow the route guidance to your destination,
and
choose the icons displayed on the map screen. ...
Guidance Prompts
INFO button
► Setup
Set the number of guidance prompts before you get to the guidance point.
Select an option.
The following options are available:
To replay voice guidance, select VOI ...
Vehicle Identification Number (VIN)
Your vehicle has a 17-digit vehicle identification number (VIN) used to
register your
vehicle for warranty purposes, and for licensing and insuring your vehicle. See
the
image below for the VIN ...