I have a 2006 Chevy Trailblazer, without onStar and the Bose system. I want to add in my aftermarket Sony Xplode radio in place of the factory one. How can I do this all-the-while keeping the price low and with keeping all of the factory chimes working properly? The wire harness in the factory radio has two bundles of wires and two plugs. My Sony radio has one plug and neither of the factory ones fit it. Help please.