Duramax all the way. I bought a new one in 13 and loved it. They work in the snow if you know how to drive in the snow. It was my daily retirement driver, 15mpg-19mpg. Quad cad. Moved to Arizona with it a full sized 8.5 camper and 20 foot cargo trailer loaded with ATVs, ammo etc. 80 mph up and down hills and didn't skip a beat.
Go big or go home. Comfy too and it was the LT.