As stated I have an 02 GMC Sierra Denali without Bose radio. When purchased there was no sound coming out of the radio. The head unit was not in lock because I could seek to different stations. When I put a Bose head unit in the pickup, there was sound coming out of the speakers but only the highs. No mids or lows. So I purchased an aftermarket head unit and installed it. Just like the non Bose headunit, there is still no sound coming out of the speakers. I did go to my nearest GM dealer and gave them me VIN number and they did comfirm that the truck does not have a Bose radio installed in it at the factory and that there is no external factory amp. If nobody has an answer to what is going on, this weekend I will be tackling the job of rewiring the speakers to the after market head unit. The aftermarket headunit is an Eclipse from Crutchfield.com. Crutchfield did state that the headunit would fit my vehicle and it does.
If they do not help you here is a place that sell only GM parts it is a place call schram auto& truck parts the # is 1-800-292-1032 and they can even sell you the right one for your truck if needed.
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Yea I am going to try to get a wiring diagram for the radio from the dealer to see what is going on. But you are right Jerry at least I will know it is done right if I do it myself. Thanks for the input.
you sound right you are going to have to track down those wires and re install them on the radio .. at least then you will know its done right .. jerry
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