If the front door on your coach “pops” when you open or close it, this the problem.
The part number is GM 15196108 Door Check, Front, Right.
Pull the panel off your door by removing the handle plate, pull handle and door lock.
The panel is held on by barbed push pins, grab the bottom and slowly work them loose.
There are two Phillips screws holding the part on.
Pretty easy fix and gets rid of the annoying popping sound.
Part is $85 from GM, $140 on Amazon.