I have an F350 ch/cab with a single stage turbo that is noisy as hell. First off the training and WSM are messed up because according to them an F350 cannot have a single stage turbo because it is under the 12,000 LB GVW stated in the WSM. But it does because wide frame/narrow frame determine turbos not GVW. Got that all figured out. Now hotline wants me to perform 12B34, a reprogram for turbo noise. Guess what, I can't find it. Has anyone State side performed this and can you provide any feed back as to what it entails and any results as far as turbo noise go?