If you can afford to own a Travel Supreme, you can afford to have an RV shop diagnose and fix any problems.
But seriously, your problem is probably wiring. Check all the the wiring connections, looking for a loose wire, probably a ground wire.
And be sure the slides rails have been lubed with slide lube.
If your voltage check shows no problems with the electric power at the motor(s) when they are buzzing, and the slide rails are lubed generously, then I'd use the manual crank and slide each room a few inches out, feeling for a bind. If you feel (or see) a bind, then figure out the cause of the bind. Maybe carpet is torn and binding the slide room floor to the trailer floor. Or maybe someone allowed a rag or dog chew toy to get between the floor of the slide room and the trailer.