Alright ya'll on my '14 3500 the exhaust break is not wanting to activate like it should in the "full exhaust break" mode.

I tried the automatic mode as well and nothing.

It will only engage in tow/haul.

The dealer said they need to plug in and update the system however it being the dealer they want an arm and leg to do it.

Has anyone else had this issue and if so did you find a way around the dealer and a way to fix it yourself.

Thanks!