Q: RV won't start

The RV’s of that year on the Chevrolet chassis are generally on the P30 chassis. One weak spot in the starting system is the ignition switch itself. A voltage check at the starter solenoid will need to be performed to verify this; this is a rather dangerous procedure. I recommend that you enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment, training, a good operational knowledge of the vehicle’s electrical systems, and access to the wiring diagrams - motorhome wiring diagrams are a little harder to come by - to properly diagnose your RV’s no start condition, and recommend the best path to repair.