This really sucks!! Mine went out too and the trucks are not the same. The trucks have an 8.25" and the vans have a 7.25" differential. The salvage yards are charging $1800 for a used differential due to them being so rare. Here's what you could do. The chevy blazer s10's and trailblazers have the same internal parts. Buy a used differential, take it apart and install all the parts into your differential.