My 03 has the "HEMI tick" 67,000 miles have not had any issues. Do a google search for hemi tick and you will get all kinds of info, I've heard everything from lifters, push rods, to the valve stems having excessive clearance. I have a buddy with a 05 and it does not make it . I would agree with the dealer that it is a normal condition. Doesn't matter any way I wouldn't want any of the bozo's around here to touch my truck, you have to pull the heads even to replace the lifters.