Customers may complain the navigation radio is not displaying the correct vehicle location icon on the map accurately after a radio or battery has been replaced or after battery power has been removed from the radio. The vehicle location icon accuracy may be degraded if the GPS signal is not available and the GPS displayed icon has a red line through it.
Models: 2012 and prior GM cars and trucks equipped with navigation radio.
The navigation radio does not keep learned GPS information or gyroscope and vehicle speed signals stored when the battery power is removed from the radio. The navigation radio continually uses GPS, gyroscope and vehicle speed data to maintain the vehicle location icon positioned accurately on the display map. There may be periods of time during a drive cycle when the GPS signal may not be available and the vehicle location icon still appears to be accurate. This is due to the radio having internal gyroscopes and receiving a vehicle speed signal to maintain accuracy if the radio had received a good GPS signal earlier in the drive cycle.
Normal driving will improve the accuracy of the vehicle location icon on the display map. It may be necessary for the vehicle to be driven up to 25 miles with 15 left and 15 right turns while the vehicle location icon is matched to roads on the displayed map.
Do not replace the radio for this condition.
Courtesy of MotoLOGIC® Repair & Diagnostics.
