I'm hoping someone can give me some insight on a reoccuring problem that I am having with my 2001 Duramax. For the past 10 months I have had an issue with the engine not going above 2000 rpm's. This happens both in summer and winter temperatures and it is not consistant. When I first had the dealer look at it they said that they needed to replace all of the fuel injectors; fortunately it was covered under warrenty. The problem continued so I brought the truck to the dealer again. This time they said it was the turbo boost sensor so I paid to have that replaced. It did not solve the problem. Does anyone have any idea's on what the problem can be?