add an amp on factory headunit?

[slamed350]

ok ive got a 2009 silverado non bose. Has onstar but not active.

 

does someone make an extension harness that I can just plug in and then cut those wires so I don't have to cut my factory harness. i want to keep my stock head unit for now and just amplify my aftermarket door speakers with an amplifier. Any help is greatly appreciated! TIA

[Chris]

This is what you need

http://www.pac-audio.com/productDetails.aspx?ProductId=366&CategoryID=28

[montyss]

that's exactly what I did on my truck 09 non bose as well , installed a factory Nav with a amp . The adapter worked great for getting the proper connectors to wire it up properly