Hello. I'm new to the site and hoping to learn about my new to me Yukon XL. At 85k, it has fairly low miles for this year Yukon. Thank you in advance for reading this and any help offered. There are 2 things that bother me, one being a hazard. First I have a constant "Cargo Light On" warning. There are no lights on while driving or when all doors are closed. This is different from the "Cargo Door Ajar". Does someone know what this is deferring to and maybe how I could fix? Perhaps, just knowing what it's referring to, I may be able to fix. The Hazard issue is the middle bench, it will not "lock" into the upright position. It is a 60/40 bench, and it is the larger part thag won't engage. The seat back is loose. I've been having a hard time figuring out the mechanics of the seat. Any suggestions would be greatly appreciated. I hope the seat isn't broken.