GM Service Manual Online
For 1990-2009 cars only

To exit programming mode, do one of the following:

    • Press the odometer button, while in odometer mode for two seconds, or
    • turn the ignition key out of ON, or
    • do not program any commands for one minute while in programming mode, or
    • shift out of PARK (P). See Shifting Out of Park .

The programming mode message will turn off to let you know that you are no longer in the programming mode.