I have a 2005 Chevrolet Silverado 1500 LS Crew Cab and I bought a Kenwood KDC-MP145 stereo to install in it. I've already installed new speakers, but I don't know how to install the head unit at all. I have seen these GM harnesses that keep the factory chimes and what not, but I know that I don't have to have that. I know how to take the factory head unit out of the dash, but I don't know how to connect the new head unit. On other cars it seems like it's plug and play or something. Can someone PLEASE show me an article, video, etc. on how to install a head unit in my truck without buying some $100 GM harness?