My son just purchased a 2006 Silverado 1500. The front wheels have a noticeable camber issue. Truck had a plow on it with the previous owner. Since been removed. Took it to a respectable alignment shop and they said it was all set. It still has that same inward leaning front tires. It is the same on both sides. Tire shop said they didn't know what was causing it. Don't know how many miles are on the rubber but the outside edge is showing wear. Due to the weight of the plow is there something that may have been added to make up for this and now that its not on maybe it has to be removed. We compared components to my truck and everything appears the same. He is planning on a leveling kit in the near future and tires too but is concerned he will chew through them quickly. Any help will be appreciated. About 92000 miles if that helps and 5.3l.