Hello I have a GMC topkick with a mui 3116. The truck stalled out one day on the highway when I drove over some rough pavement. I believe it lost prime and I could not get it to restart and had it towed to a mechanic. When the mechanic went out to check it out the next day it Started up. arrggg. Anyway I noticed it had pressure in the fuel tank( not a lot ). Is pressure in tank normal? I also didn't see a fuel hand primer!? Any thoughts on this truck, mechanics fixed a loose wire on the oil low side but could not confirm the truck is fixed. New fuel filters and such were replaced. I pick the truck up soon and its a 2 hour ride home. Any info could really help as I'm nervous about driving it.