No real personal experience here but I have seen several issues like this and the common thread seemed to be that they had a lift or big tires. Do either of those apply to you?

 

Yeah, 6" lift and 35" Toyo MT's
But I've ran a good 6 months post lift before this started happening

 

Yah, but still. If you do some searching on this forum, you will likely come across a few threads on the subject. I haven't followed them very close so you may even come up with a solution in one or more of them. Not sure why it just started for you, but I think it is safe to say that without the lift, you would probably not be having those issues right now. The lifts and big tires seem to be the common denominator in these situations.

 

I had the same issue with my 2012, it was not lifted at the time, but it ended up being a bad wheel speed sensor(back right, probably took a corner too sharp and went over the curb). If yours is intermittent with left turns, I would check the connection. The rear ones are easy to change. The front ones are part of the hubs I believe, or at least from what I was told, you need to get to the hub itself to check the sensor.

Some people also noted the same issue coming from the break peddle position sensor, but that is usually accompanied with the truck going into "low power mode"