I recently purchased a 2006 Cobalt LS and the previous owner installed an aftermarket radio. To get the price down, I let him keep the radio and reinstall the stock one. I tried the radio out and I can only pick up one local FM station, the rest are static. I took the stock radio out to look at the back of the radio and there was an aftermarket adapter running from the back of the radio to the antenna jack. I went my local Chevy dealership and the parts guy told me that I am missing a wiring harness to hook the stock radio back up to the antenna. He wanted to charge me over $200. Is there anywhere online where I can get the harness for cheap and not mess up anything electronically?