Brett Wolfe had the right answer like usual; You need to find out what is driven by the serpentine on your coach. If you don't know, ask the mechanic. Our power steering and hydraulic fans are powered by an engine-mounted pump, so loss of the serpentine does not affect the power steering. We have lost the AC compressor belt. We considered a coach with a C-12 engine, and I noticed the serpentine belt powered the AC compressor as well as the alternator. If I had bought the coach, I would have gotten a belt to bypass the AC compressor. In either case, keep spare belt for your coach. If the belts coming off are real bad, I would replace the belts after a year or so to have better spares.
