6.0 whining noise
I was pulling a load this weekend and when the RPM's reach around 2200, I get a whining noise from under the hood, it last for a short time then in about 10 seconds it whines again. This only happens over the 2200 mark. It is like it only happens when there is a load on it. At low RPM's the truck seems to run fine. I took it to a dealer and they mentioned that the Turbo may need to be cleaned, He ran all test w/ computer and the truck passed all test. I just need to know if someone has had something similar happen and if it is a DYS fix or a dealer/mechanic fix.