[3Hummer]

Im on my second H3 now, I had a base 2007 model before my current truck. My last one ran like that all the time, when i would drive it for long periods of time the height guage would go up. I live in Florida so the heat is rediculous to begin with so I think that may have had a lot to do with it. I had that truck for 3 and a half years and it ran between half and 3/4 the whole time I had it. Never thought it was an issue since it was in range and never had any major problems with my truck involving the engine. i wouldn't think its anything. However your truck is still covered under warranty so for piece of mind you could always check. ive had my 2010 H3 Alpha now for 3 months. I havent really payed attention to the heat guage on this truck really but I will over the next few days and let you know what i see. Best of luck and hope you enjoying your H3