DEF gauge isn't going down, I've gone through 1 tank of fuel already since I got it back from the dealership to fix a check engine light, they said it was a loose module connection. I have 1200 miles on my 2019 classic ecodiesel
My new truck is breaking in funny. It seems to be losing coolant I got a good deal on it, from rebates, but I'm about to file for lemon law. Jk i only have 700m on it check engine light already.