Sierra 1500 2WD V6-4.3L (2008)
Navigation Software Update Procedure:
Use the following procedure to update the Navigation Radio software using the Nav Software Update Disc P/N 25956121 (software version 0B92):
This software update can only be used to update the navigation radios specified in this bulletin. DO NOT use this software to update any other vehicle's
navigation radio.
The Map DVD will be needed to verify the system operation after the software update has been performed. Use the vehicle's existing map DVD.
It is recommended to wear latex gloves while performing the software update, to avoid fingerprints on the product and discs.
DO NOT stop the engine until all tasks are completed. The software update MUST be performed with the engine RUNNING and the gear position in
PARK. If the vehicle is turned off prior to the software update being completed, the process may not work again and a new Navigation Radio may be
required.
The software update requires using the map DVD slot. The update will not work if the update disc is inserted in the top slot (CD or CD/DVD audio slot).
Start the engine, with the gear shifter in PARK - wait until the audio or caution screen is displayed after the opening screen.
Press the "NAV" hard key.
Press "OK" soft key.
Press the "MENU" hard key.
Press the "NAV" soft key.
Press the "MAP DATABASE INFORMATION" soft key.
Press the "CHANGE" soft key.
The navigation radio automatically ejects the map DVD. Remove the ejected disc.
Load the update disc into the slot located behind the display screen by inserting it partially until the system pulls it in.
DO NOT put the disc in the top slot. DO NOT force the display to close. The display screen will remain in the open position until the update is
complete.
The screen "PREPARING TO LOAD SYSTEM SOFTWARE" will be displayed while the update is loading. The update should take approximately 4
