From what I can tell most pickups with diesel engines do not come with exhaust brakes on them, except, I believe, for the latest iteration of the 6.7 Cummins. For those of you who have diesels, do ...
Hammer21661, sorry you had a bad experience, a call to Pacbrake might have solved your problems. I have a 5 speed manual and shifter mounted switch, I leave it on most of the time just need to turn off about a block from home to get the EGT back down to 300 degrees.