Yesterday as I started heading up over Mt. Ashland on I-5 Southbound I had a "Stop" light appear on my dash. Scaring the bejesus out of me, that's exactly what I did. I couldn't find an explaination for it either because of stress, or it just wasn't in any of my literature. There wasn't anything wrong according to my instruments and all my fluids were ok. It happened once more on the way to the top before I decided to creep up the hill. The slow crawl seemed to do the trick as I didn't have a problem with it the rest of the way up. Down hill and flat driving, didn't recreate the problem, but under normal driving conditions as I started up a hill and increased throttle pressure the light would come on. That's when I noticed that if I let off on the trottle pressure, the light would go off. I have a 2000 38ft. Monaco Dynasty with the optional 350 Cummins, 6 speed Allison. Can anyone explain what that light relates to and have any of you out there had a simular experience?