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  1. Maintenance
    Bought my 2010 GMC Sierra 2500 about 6 months ago and just realized after swapping out the stock brake assemblies that the rear has a 2inch rough country spacer and the front has no spacer. So under the truck it’s got the 10.5” 14 bolt rear diff w/ the 2 inch spacers yet nothing on the front...
  2. Engine & Performance
    Currently, I have a 3.23 rear gearing on my '08. It has some sort of locking differential that I believe to be the G80. Is it possible to change the gearing and keep the LSD it came with?
  3. Lifted Suspension & Offroad
    I believe that my differential may be going out. In concrete parking lots, I hear a some tire squeal if I have the wheel cut all the way. My truck is a '08 RWD with the G80 locking differential running on 245/70-17 tires; I plan on putting bigger tires on it eventually. If I have to replace...
1-3 of 3 Results