Originally Posted by Jason.
Mines done it a few times, but the odd idle kinda got me to thinking, opened the hood and checked for any coolant, don't want anymore headgasket problems with this thing, if its the gaskets again, I'm taking out a signature loan and putting a damn 12v cummins in her. lol
Now now, watch your mouth lol. (I've thought about the same thing). idk why it does it, but mine does the same thing. It will do it too if I hold it at 1500 RPM in P or N for like a min, then let off. It has like a cam lope, and the truck bounces lol
If yours it like that I wouldnt worry.