I just got back from a 5500 mile trip to the west coast pulling about 20,000 lbs. It seems like I was about half-way through the trip when there was times I would get a sharper diesel sound like a high compression knock or mabe it was the injecter knock that some have described. Now that I am back it seems like it is here to stay. It sounds like the ole' PSD diesels. I cannot have the truck go down on me. Do I have enough ammo. to make the dealer make it right, or should it be ignored. The truck runs great, nothing else seems to be amiss.


'03 Silverado 43,000 miles

Dirt Farmer,

I think you may have an injector overfueling a cylinder:(, it is definitely worth having checked out, I don't believe your description of the symptom would fall under the "normal noises" catagory, in particular they will likey check for dtc's (codes) & check the balance rates of the injectors. You definitely do not want to overfuel anything towing 20,000 lbs.:eek: Even if they tell you all is good:rolleyes: (doubtful) at least it's documented, make a point that you do heavy towing, (nothing over the legal limit of course) & cannot afford to be stranded with a mechanical breakdown & to please be thorough in their diagnostics:), the noise is usually an early warning sign not to be ignored...don't let them;).

Todd.