Originally Posted by Big Angry Hillbilly
If your truck also has leaking EGR cooler(s) on it, this can cause positive results on the dye test.
Measure the cooling system pressure when you're honking on the truck - if it rises to or exceeds 16psi you will need to pressure test the EGR coolers first, then evaluate the head gaskets.
What are the symptoms you are experiencing to get you to the point where you got the cooling system checked for combustion gas?
Im not experiencing any real symptoms, i just bought the truck from an out of town dealer. The alternator went out five days later i took it in to have it replaced at my trusted local shop and asked they go over the engine as it is a new purchase. They did the dye test and it failed, it also had a slight misfire on cylinder six. I took the truck back to the dealer, they did a pressure test and didnt find issues. They then would not tell me if the truck passed or failed a dye test they instead said it was an out dated test and wouldnt matter anyways. Im really trying to understand what to believe.