Last spring one of the trucks on our expedition lost a fuel pump on the Mormon Hole-in-the Rock trail. I have a 91 Blazer and am having nightmares that this will happen to me one day. I've heard about making cutouts and removable covers on the back floor in order to get access to the fuel pump. I've also heard about auxillary fuel pumps but I'm not sure how these would work. Does anyone have any experience or knowledge on these modifications? Would appreciate some advice.