I have a 01 duramax lb7. For a while now it has been going into limp mode. Yesterday I noticed a drop in oil pressure. And on the way home it began leaking large amounts of fuel from front and rear of motor. It is leaking around the ( what I think would be a harmonic balancer if diesels are like gas motors) in the front. And leaking out of a drain hole that is in between the transmission and the motor in the rear. Need help on what may be the problem. I'm new to diesels so any help would be appreciated. Thank you