I recently lost my RV door keys and was in process of hving them replaced by GS service call to locksmith. My neighbor with a different model of Coach tried to open my door and low and behold it open...
But there are some RV manufacturers who do not use those cheap, all the same, RV keys. I can't even buy the blanks for my motorhome's locks at a RV store. Have to go back to the manufacturer or a locksmith. Hardware stores do not even carry them!