[frostygt]

well depending on the dealer but most i know the software is free its the fact they have to pay someone to do the work that you will have to pay for.
before you agree to any work get a quote, it should be between half hour to 1 hour tops labour. for them to flash the pcm. but see if you can get them just to check if it is update able first so that there not charging you doing something thats already been done.
and also get them to scan for and write down any dtc's (trouble codes) some may be there without turning the engine light on.
good luck and hopefuly your trip to the dealer doesn;t turn out like a few of the others i have read about latly... to bad they all wheren't as good as my dealership.