The screen on the radio of my 2011 Tahoe went out, so I purchased a radio from the local salvage yard. I installed it and clearly the word "Locked" showed up on the screen. Has anyone tried unlocking a 2011 Tahoe radio part number 20934593? I have seen some videos on removing a chip but none of the videos has the same radio as i do. The dealership has told me that they can try to reprogram but not guaranteed due to the year.