I have a 2005 SUT. I plan on putting a set of 20" x 12". I have been told that I need to lift the Hummer for these wheels to work by a shop that I think wants to sell me a kit I don't need. The wheel shop has told me it would be fine with torsion bar adjustment. Has anyone ran into this before?

 

HAs anyone done a diesel conversion? I'm am planning on getting one done but also want a compressed natural gas on top of that. anyone here have any insight for me.