BOB4X4, Sometimes you express your concerns to the service writer and he/she can omit certain statements. One example in my case was the Vent Door issue, at 15K and one year into the warranty. I had maintenance performed and I complained at the time about smelling diesel fumes when in recirculation mode climbing grades from the semi trucks and also the AC on the passenger side seemed not to perform as well as the driver side. I was told that the newer trucks had a built in fresh air system due to the new airtight cabs that were now being built and there is a TSB on the AC issue due to under charged systems for that MY. I believed him because I'm an HVAC contractor and fresh air is a requirement for commercial applications as well as new home building codes. (in some areas) The AC condenser had to be replaced, reinforcing what the service writer had told me. So I ignored the smell when climbing grades, the odor was not that bad. After 50K miles the odor became bad enough for my wife to complain all the way up the grades and was now complaining about it when driving behind a semi on flat surfaces. Knowing about the vent door issue from TDR and that I had a factory extended warranty, I complained to the same service writer about my concerns, and to have the vent door checked. Well, his next statement from him was "your extended warranty does not cover it". So did he say "oh ya, thats right, you complained at 15K and don't worry it will be covered"

. It cost me $500. 00 for the repair. This was after a tech confirmed to him that there is no fresh air forced into the cab, that there are a small set of vents behind the cab for atmospheric pressure relief.
So it is possible, it happened the way SPickett described, that the service writer ignored him, and it should be a lesson to all, to make sure the service writer records it, and you need to look at your written estimate prior to paying the invoice or signing it whichever is necessary, that it states just that. It would of saved me $500. 00 possibly, because there would have been a written record of the first complaint. BTW' no more smells from the semi's now, and the AC is a lot better, that has never been the case before, with 50K+ miles.