In the one experience I've had similar, the truck was only a month or so old and like 5kmi and I'm certain I would have had to get an attorney to push the issue as mediation was a joke and the dealer just stalled or sand bagged my lemon law requests. Fortunately the 3rd repair fixed it for good and no other lemon issues again but it took a while before I trusted the truck.
I would say if you have a recurring problem they can't get fixed you "might" get some traction but if they are mostly separate issues each time, even if some issues happen more than once then it will be very difficult.
Good luck, it's super frustrating when you don't trust your big tough expensive truck.......
Edit, just read the above and that is a great suggestion. Push them first for buyback and "settle" for a great trade in value as a plan b.