Hi, New to the forum and new to owning my 2005 Regular Cab 2WD Silverado 1500 W/T. What I got is a really basic truck that's all stock including the AM/FM radio which is soon to be replaced. My question is that the stock radio has a fader to front speakers and there are speaker grills in the doors but I got no sound. Did these trucks come with a stereo with a fader but with only 2 rear pillar speakers? Wouldn't be the strangest thing Chevy has ever done. Also a reputable local stereo installer initially told me I would need a GM0S-01 for about $85 for the door chimes to work. That was when I realized there are no door chimes from my truck if I leave the key in the ignition and open the door or turn the headlght switch to on as opposed to 'Auto' either. Should it? Thanx, -Pete.