The biggest lie the dealer told me when I bought my Class C brand new was how I could just take it into any Ford dealer for engine and chassis work! HA!!! The shop door is too narrow or too short, or they don't have a jack big enough, or their employees don't know how to work on that gas engine, etc. etc. etc.
Over the years, however, I have found a couple of places that would work on mechanical things on my motorhome. Believe it or not, one is the gas station on the way into Bryce Canyon. They have several large bays and are used to working on big RVs as well as medium-duty trucks. Plus, the national park shuttle starts right outside of their station, so you can spend the day sightseeing while they are working on your rig. Another is a small place in near Solon, OH, which is south of Cleveland.
Which reminds me. I need to get a front-end wheel alignment. Anyone know of a place in Las Vegas, which is where I will be next week??