I’ve got an ‘01 Sierra C3 (Sort of a proto-Denali, maybe I’ll write about it one of these days). It has the same 6.0 V8 as this truck and is still going strong with ~187k miles. It’s AWD, but not 4WS, so I can’t speak for that except to say I’ve heard horror stories of massive repair bills when it breaks. Overall,…

Double sided wedge is best wedge.

Looks more like an Evora with a body kit to me, given the slope of the roofline.