I have a 2004 Silverado 1500 LS with a 4.8. Only in the morning, when I first start the truck, there is no sound from the radio for about 10 minutes of driving. after, sound comes back and radio works fine. when I get to work and leave the truck all day for about 10 hrs, radio works fine. this happens like clock work everyday. Is this a common problem with these trucks? I assume the truck just used the radio, sound amp and speakers unless I am wrong.