This is my last word on this subject. I did not sell the radio to a third party, I had GLU send the radio to the person who is restoring my car, so the radio could be installed. Here is what I received in correspondence from the installer:

"My electrician told me that the radio you purchased doesn't work. He wired it in and hooked it up to your new antenna and speaker and apparently no sound comes out. He also said that the tuner on the radio doesn't work and that it only jumps to pre-set settings previously set when the buttons were pushed to select stations."

I asked for my money back, and was refused by GLU.