Hmm, I thought all the plugs on the scanners were the same....no expert by any means and I don't own one (auto zone and checkers are only 3/4 mile from my house). If your not to mecanically inclined may be worth having it taken to the shop. Just ake sure its one you trust and that has a good reputation...plus knows Isuzus! There are plenty of Chicago VXers on this board that can give you some recomendations.
God luck on the new job prospect...you'll be a ot closer to Moab!