2000 K2500 7.4L Jez, I keep finding more things to fix. When will it end? Anyway, there is a noise under the truck when I am driving. I thought it was the rear brakes, but it doesn't go away when I am stopping or touch the brakes. I think it is in the drive line. I have replaced the carrier bearing 3 times. This noise is not present when I jack up the truck and put it in gear. Even up to 30 mph, but on the ground and rolling, it is there. It sounds like a rubbing high pitch noise. Could it be a u-joint? Or do you think it is the carrier bearing? I hope it is not something in the rear end. Also, is there a belt that wont squeal after 1000 miles? I have tried Autozone, Advance, and Napa (the belt was 2x $ as much too). They all seem to squeal after 1000 miles and I get tired of replacing them even when they are free replacements.