I have a rear defroster that I'm not going to use and would like to pass it on to a new owner. I looked for a GM part number but could not find one, so this unit may be an aftermarket defroster. I do not have another unit to compare it to. I took several photos of it for you to see. I did bench test it and it does work. It does have a grille but the studs are broken off, but they can be drilled out and new bolts added. I just want the shipping cost as payment.
Tony
