CMOS, just curious as to how many miles you have on your truck. I think I am in the same boat as you... 35K+ miles. I have to make a decision soon. I was quoted a price of $199, so I think I am leaning toward letting the dealership change them. If I do have them changed, I will ask for the old plugs back just to make sure they changed all of them. Let us know how it goes and post up some pics of the old plugs.