Join Date: Oct 2001
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Re: 3/4 Ton 4x4 Duramax Questions..
I want to say there are ways to get a lift without voiding the warranty, but check with ur dealer.
As for bed supports, you just have to support the space between teh bed and frame anywhere the bed used to touch the frame before the body lift. But i would brace more to be safe. Just get some square tubing the size of the body lift and put it between teh bed floor and frame, and weld it on.