Originally Posted by 2500HeavyDuty
there is a shrader valve located next to the alternator, but that's for testing for vacuum, basicaly tells you the condition of your fuel filter.
you can do a balance rate test and some other tests, but the main thing is that it holds desired rail pressure
is there a way for me to check that (balance rate, and/or the rail pressure) or do i need to take it to dealer?
2500HD I saw a post that you had on here with the elevated oil pressure. what was the outcome? issue? i dont want to hurt the truck and as i said the pressure shoots up to 80lbs when on gas and 40lbs at idle