To turn off the radio, hit the center of the volume button. Unless I misunderstood you =) And the DEF going low after that many miles is not unheard of. I think it depends what the dealership put in the truck before you got it. And probably how much you work the truck, like if you towed that trailer a bunch of those 3,400 miles. Our DEF lasted until 6,500 miles. Got our first free maintenance and they didn't fill it up completely, because I didn't make it nearly as far this time before it went from saying DEF: OK to reading a % of DEF remaining. If you fill it up completely, I'm not sure how far you will make it, although maybe someone else can chime in on that.
Glad you appreciate the site. There is lots of helpful info on here. And if you don't see something, just make a post and ask. Lots of people from different backgrounds who know a lot already about these engines/ trucks.
Glad you appreciate the site. There is lots of helpful info on here. And if you don't see something, just make a post and ask. Lots of people from different backgrounds who know a lot already about these engines/ trucks.