I doubt the re-flash is going to do anything. It will upgrade the software to the most current version and IF your idle problem was one of the fixes in it, you'll be fine. I just don't see it too often.
You need the codes in the computer to troubleshoot. There is a wide variety of possiblities of potential sources for the rough idle.
Denso are good plugs, gennerally run in foriegn cars. I would use AC delco or auto lites on your truck, if it were mine however.
Wednesday, April 18th, 2007 AT 9:46 PM