Big Dog Mack

Coolant tank is full, going to check the sensors today. Making a appointment to put on a scanner the guy only charging me 100. At least I'll know more than, I hope thank you.

What if you're cruise control and engine brake button aren't working either?

I have searched the internet I read all kind of forums and blogs I have no diagram and the ones I find don't look right. My cruise control and engine brake are not working I checked the fuse panels they all look good I have an automatic 2010 pinnacle MP8, CXU 613 I believe are the numbers someone please help I just need the location or something to look at where to look I own this truck and just trying to get by, so taking it to an expensive mechanic is kind of out of the question right now. I hold 45,000 lb the other day and without that engine brake I was flying! Anyway thank you for anyting any idea where to look.