general problems of the 2011 GMC Sierra 2500

My abs and traction control and stabiltrak and service trailer break system keep going on and off its the most distracting thing I have a video of the chime not stopping. My water in fuel sensor won't go off I have un plugged it and changed it and the filter and when I unplug it it stays on.

The vehicle abruptly caught fire while driving on February 20th 2021. The reason remains unknown. Please see attached images.

Fuse for left turn trailer burns out repeatedly. No warning or indication it is out until someone pulls me over or tells me when stopped or I check. I have three different trails and all are involved. The fuse will at times, be blown without trailer attached. Dealer can't find issue (intermittent problem). Never know when fuse blows unless I check it or hook up trailer. Always left turn trailer fuse. Truck does have two batteries and is diesel. Has happened many times, ever since truck was new. Last time, jan3, 2017. Sounds similar to recall 14v407000. My truck was manufactured during time period given but never received notice of any kind.

Vehicle sporadically spontaneously locks all 4 doors within 10 seconds after closing the door. No touching of remote, no accidentally hitting a door switch while exiting the vehicle. It happens when I'm at the back of the truck, or 10 feet away. Always within 10 to 15 seconds after exiting. It may sound strange, but it happens more often toward the end of the onstar yearly contract. Safety concern - I have a 3-year old grandson who likes to go with me. What happens if I forget to take the keys with me while I'm refueling on a hot summer day and I haven't extended the onstar contract? obviously, I'd break a window if necessary, but then I'd have to buy another window. It appears my vehicle is not the only one having this problem. Of course, no trouble codes therefore dealer can't repair, but my dealer's service rep admits it happens very often and not limited to GMC trucks.