[dajn]

At work I had a c6500. 8.1 that was always hard starting. 336,000 miles before they bought me a newer box truck. Anyways, some guys would get in it and couldn't get it to start. I got used to the drill when it was extra stubborn. Whirl it over awhile, then stop. Then turn the key back on and wait 5 seconds or so. Usually it would pop off then. If not whirl it over and try again. I always wanted the shop to put in a new fuel pressure regulator but they never did. There were a few times it backfired crazy loud. It sounded like a 12 gauge going off. I have never heard a backfire that loud before. That happened a couple times during the 5 years I had it. And lastly, those 8.1's sure are tough. I was never under 20,000 pounds with it and usually around 26,000 pounds. It burnt oil of course but it sure got abused and took it.