I just purchased a 2006 cobalt LT, and I'm looking to install the head unit from my previous car. I went to a few stores and the only wiring harness I could find for the car costed 100 bucks. I'm thinking to myself there's no way I'm spending almost what I bought my head unit for on a wiring harness. Is there any way to wire it up using the factory harness? Thanks in advance for any help.