Thanks again everyone. Yep, spoke to the dealership and to GM and they all say the same thing, "aftermarket parts are not covered". Though the GM rep did agree that it was poor on the part of the dealership that they did not state this up front, The dealer stressed the B2B warranty in the sales process. Shame on me for not paying attention and asking them before the deal was done. Hopefully, nothing happens to the radio. Thanks again.