I have a 1998 that had the same problem. One night I disconnected the battery to keep the lights from draining it. The next morning when I connected the battery back up it fixed the problem. I guess what ever was causing the problem reset itself. But remember any time you have to dissconnect the battery cables you will have to reset any pre-programed radio stations and your clock. But the first you will need to do is turn off everything in your cab radio, fan, lights, ect. And let your engine idle for about 2 minutes so it can reset the idle speed. Hope this works for you like it did me.
Monday, December 17th, 2007 AT 9:16 AM