Doing some research so I can install a stereo into my dads truck. I don't see paying $129 for a wiring hareness. Thats crazy! He has an 09 Silverado with onstar NO bose. He doesn't care about losing the onstar since he wont be subscribing to it. Has anyone installed an aftermarket stereo without the expensive hareness? Any tips or what did you use to do it? Thanks for your help.