I have a 2005 and I wanted to get spacers for my rear wheels. I can't remember the exact dimensions, but I was told that 1/2" spacers wouldn't work because I wouldn't beable to get enough "turns" on the lug nuts. They said I had to go with at least 1.75 - 2.0" spacers. Essentially, the new spacers would have 8 new bolts and the existing 8 bolts would be covered by the spacer. These would have been CNC'd out of billet aluminum. Decided to not do it because then my tires would stick out past the fenders too much.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!