03 Tahoe with Bose how many plugs

[hugger6933]

Are in back of the radio? I have bought a 03 Tahoe that had a Sony radio in it and I took it out to replace it with the factory unit. I know about the reprograming tech 2 stuff I have been around doing this since 87 and I hve gotten where I like the looks of the factory stuff much better. It is also more easy to sell that way. Anyway back to the problem I had some bose radios in stock and removed the aftermarket radio no wires had been cut any where that I can see. I have gone as far as removing the top cover and taking out the seats and pulling back the console[by the way the factory amp is till in place]but I can only find one plug and it is the bigger of the ones and it is grey. Question is does the bose radio have two plugs in it to make it work? When I plugged it up I had no lights or any thing at all to even indicate it was locked. Jim