All of the previous comments are appropriate. However, the 30,000 mile service done on my truck was the last time it ever saw the inside of a dealership. DC adjusted my valves but neglected to tighten all the valve covers (oil everywhere), changed the rearend gear lube and those bolts were loose (leaked) also. Turned my front rotors without informing me and took off way to much metal. It really made me wonder if they new what the heck they were doing. Not trying to bash the dealer, but that's just what happened. It really opened my eyes to the fact I did not really understand how operate and care for my vehicle instead of just being a driver. I immediately bought the shop manual and read it. With right at 120,000 miles, the truck runs great. If you want it done right, do it yourself.