GM 8-Lug vehicles are known to have a front bushing problem in the lower control arm. To prevent this problem from causing more problems further down the road, the problem should be fixed now. The front bushings work themselves out of the lower control arms. The solution is to press out the front bushing and press it back in from the other direction. Instead of the bushing being pressed in from the front of the truck toward the back, the bushing will be pressed in from the back of the truck toward the front. Normally, the bushing flange is on the left. When you are finished swapping the bushing, the flange will be on the right. This will keep proper location of the lower control arm and bushing.