Hello, my coworker and I both have the new 3.0 duramax. I have a GMC and he has a Chevy. He drives a lot of miles to work. His truck threw a code the other day and he wasn’t sure what is was. Has had a few issues in the past with his truck already. Got about 20k miles on it. Anyways we checked his oil and his dip stick was dry. Had the oil changed 3k miles ago and it was dry. Took the truck into the local dealership and they told him his truck was three quarts low and that some of these engines are burning a lot of oil. That’s a quart a 1,000 miles! The dealership told him a service bulliten just came out for these engines for oil issues. I’m out working so I’m unable to check my engine out to see how mines doing. Thought I’d post this and see if anyone else is having issues like this. Thanks