I brought my 2008 F350 job 1, with just under 60,000 miles, to the dealer for an oil change. When I picked up the truck he advised that the idler pulley didn't sound good so he changed it and the belt under warranty. I bring my truck to this dealer in Londonderry, NH for regular service and consider myself lucky to have found such a good dealer. On a subsequent visit they replaced a ball joint (under the extended warranty) because there was some play in it.

Jim