Yeah, the PCMs that control fuel management to get the best MPG out of big trucks are tricky. They tend to look for load or demand on the engine as to minimize fuel consumption until needed for heavy loads or towing.
Unforunately, you may have to keep riding the dealership about this. Then you might also ask to see the Service Bulletins as well as Recalls at the Service Department where you are going to. It certainly helps if it is the dealer that you bought it from.
Service Bulletins are something that a manufacturer does not have to report and is published within the company only. So, they are there to help diagnose problems. If they are aware of some issue, there is probably a service bulletin. Next check the VIN number of your truck against affected VIN numbers in service bulletins and recals. Model year does not mean as much as the VIN when bulletins are an issue as they are generally fixed on the assembly line andonly affect a certain, Run" of trucks made before a fix was put in place.
Sounds like a lot but it does not sound like your truck is behaving as it should and you want to protect yourself in the least in case this issue shortens the life of the transmission.
Complaining and making sure the problem is printed out in a repair order or documented may be the best you can do for now.
Let me know if this helps.
Sunday, November 21st, 2010 AT 2:51 AM