I've got a 03 GMC 3500 SLT crewcab. It originally had a AM/FM stereo with CD, cassette and the Bose speaker system. The previous owner took out the original radio and put in an aftermarket system. I want to put the original system back in. The doors still have the Bose speakers (4) but I don't know where the other 2 are or were located. Also the GMC site says it may have a Bose amplifier. Is it located in the radio itself or in another location? I'm trying to figure out what I need to purchase.
Any help will be appreciated. Paul