I have a 2002 GMC 2500 HD 4x4. I am having a problem with oil in my water. There is no water in the oil. My truuck runs very well, besides having to put water in it every day so I wont have any problems. I know someone that said it was my oil cooler which I believe is my oil filter housing. I cant find any other posts about this problem, even though I am told that duramax's are notorious for this problem? Has anyone else every come across this same problem.