When I bought mine I looked up the old Isuzu dealer here in Denver.

They are a VW dealer now and had the old Isuzu guy still there that had all of the factory VX training.

I didn't have any work done by them, and the VX really needed very little, but at least I felt good about who looked it over.

I talked to the mechanic for a bit about the VX and he helped me understand it and confirmed many of the things that I had already learned on this great forum.