04 Trail Blazer radio problem

[John R. Thomas]

I bought it with  a dead CD player.  A yard  an hour from here sold me a radio/ cd/ cassette with the vin from the donor vehicle.

Last week it was installed by an expert.  Yesterday the local Chevy dealer unblocked it for $136. +  tax.  Drove home and installed a CD

You can guess.   The yard offered me another radio...untested.  OOPS!  If the radio is removed and taken to a repair shop, how long will

it hold the unblocking program?  Please advise.

[MaverickZ71]

The best advice we can give you is that you'll probably get a better, more prompt answer if you post in the correct section.  You're asking about a problem with an '04 Trailblazer in the '19-'20 Blazer section.