The fan clutches for the 03's are a complete piece of garbage. Adding some electric fans has them lasting much longer. My most recent fan clutch crapped out a couple of weeks ago making it # 14. The addittion of two Thinline Rapid Cool fans from Hayden has helped tremendously. The last fan clutch had nearly 60,000 miles on it before it tanked. MY AC blows quite frigidly now even at an idle and there is no hint of failure when towing steep grades with the addittional electric fans. Funny thing is that if you research addittional electirc fans you will get varying opinions but from my experience they cured the problem or at least made it more acceptable. Not many things more frustrating than overheating that truck when it's 105 degrees outside. Props to Sag2 for giving me the heads up on adding the fans, thanks Sag2!