I think they are full of crap. To order a radio, you need to have the part number. The part number of the radio is not something you look up in a catalog. You get the number one of 2 ways. 1., pull the part number of out the exisitng radio and order it. 2. call gm's parts division and they can find the part number of the radio that it originally came with. In other words, they could not do a swap that way.
Maybe a parts guy on this site can either verify or correct me if I'm wrong. We are wanting to order H3 nav radios to be able to install them, but have to wait until we get one in with nav so we can get the part#
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