I think that the dealer should offer you a loaner car/truck in order to satisfy a customer--that being you. It shouldn't have anything to do with whether Isuzu offers rentals or not. Do they want you to buy another vehicle from them ever again??

When I was getting my engine replaced, with-out any assistance from Isuzu, my dealer gave me a 2002 Chevy S-10. That was just to show me--the customer-- that they valued my business and would hope that I would make another purchase with them in the future.

Use your I'm the customer power to force them to offer you a ride while your VX is getting repaired.

No loaner--Blah plooyee!