We've got an '01 2500 Suburban 4x4, 8.1/4L85E/3.73...wife loves driving it, and a Dmax swap intrigues me. So, could a guy put a Dmax in it, keep the 4L85 & stock rear (10.5"?), and use the 250hp(?) tune from the Express vans w/Dmax? The 8.1 probably has enough radiator, but would the van's intercooler setup work in the Sub? What about the ecm & tcm? Anything else I'm missing?

We've got the trucks for heavy towing, so the Sub mainly just pulls kid hauling duties...