2007-2019 Chevy Silverado / GMC Sierra 1500 Ext Cab Over Axle Frame Section RB7335L/R Rust Buster FrameworksThe Over Axle Frames on 2007 2019 Chevy Silverado GMC Sierra can deteriorate over time from the combination of various elements that the truck encounters on the road. This is not an ideal situation for such a crucial piece of the frame that sits below the bed of the truck. If these break, it leaves the Silverado Sierra with uneven stress to the frame and can be destructive to other parts near and around the rear of the truck. That's where we come in;