I have a 2015 Big Country 3650 RL. My exterior wall has a 11 1/2" crack going from the bedroom slide to the bottom at a diagonal ending by the tire label. I have had 3 RV dealers tell me this is a known issue with Big Country and Bighorn. They say the Frame is broken and it may have a broken weld. Has anyone had this problem and will Heartland do anything about it? Thank you.