Does GM offer a Colorado 4WD model with the 5.3L option? I have a dealer that has located one at another dealership that he says has the leather option, extended cab, 4WD and has the 5.3L V-8. Every website that I've looked at doesn't show that GM offers that truck with the V-8 in a 4-wheel drive version---only rear wheel drive. I'm looking to buy a good used one and I told him what I wanted---and the truck sounds like what I'm looking for, but I question whether it has the V-8 or the 5 cylinder. Can anyone help? Thanks!