The last word from the service manager was that it is covered by warranty. For those of you that have a 2014 or newer Duramax, the problem with the CP4 High Pressure Fuel Pump is something to worry about. You can find out more by searching Duramax CP4 problems. There is no forewarning or indicators. If the pump goes, it disintegrates and sends metal particles into the fuel rails and injectors causing a catastrophic failure. The service manager said it is a 10k to 12k repair if not covered by 100k/5 year power train warranty.
