Keep the stock OEM unit and add AudioControls LC6 unit and maybe even the EQX. Both units will hook up after the Bose amp. This way you have all the stock functions of the steering wheel/onstar/ head unit.
If you want to wait until May, the JL Audio Clean Sweep will be out, this will be the best solution for all OEM intergration with after market amps, speakers etc.
Either way with the LC6 & EQX or the Cleansweep roughly $400
Mike
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