How to Unlock a GM Bose Radioby David Clair
Some GM vehicles come with Bose radios that have a theft-deterrent feature. This feature renders the radio inoperable if it is removed from the vehicle. The theft-deterrent feature will also be activated if the power to the radio is interrupted, or if the battery is removed. The Bose radio can only be reset by entering a unique unlock code. If you do not have the code, you can obtain it by contacting a GM dealer.
Turn the ignition switch to "ON" without starting the engine.
Press the "on" or "power" button on the Bose radio to turn it on. The display will indicate that it is locked.
Press the "HR" button repeatedly until the first two digits of the code are displayed.
Press the "MN" button repeatedly until the last 2 or 3 digits are displayed.
Press the "AM/FM" or "Band" button to confirm entry of the unlock code. The radio unlocks and can be operated normally.