For the duramax owners getting a p003A code for turbo vane issues this is why. The ring that rotates back and forth opening and closing the vains seizes on the housing from soot build up. If caught and cleaned early enough will save both the turbo and the rest of the engine from futher damage. We will be doing a bunch of videos coming soon for commonly found diesel issues and how to resolve them. For the do it yourself men and woman. If there is a specific problem you want to learn more about le