I've had never ending display of "check engine" lights on my '07. 5, 2500 6. 7L. The dealer has told me today that they need to install a new turbo! Thankfully it will be a warranty repair. Has any one else been down this road with the early 6. 7 Cummins? Also considering the installation of a boost gauge to keep a better watch on what's going on. Any recommendations on best pressure scale to use as well as the need to read vacuum pressure?