First off Welcome to the Forum!
The advice that you have been given by all is pretty sound and comprehensive. I would go with j-d on the valve stems by The Tireman or Borg,I have the Tire man ones, they will make your life a lot easier when it comes to checking the Air Pressure.
I did notice that your Class C is on a Chevy Chassis. Most on here have Fords so you will get a lot of advice based on that fact.
In my signature there is a clicky about Class Cs on a Chevy Chassis that you may find of help,especially the UPDATES. If it is not there then just ask or send me a PM, you can find how to do that in
My Profile.As you have found, if you need anything answered people are here to help, even us Chevy Owners...........:B
Have fun and enjoy.
