2012 Chevy Silverado Z-71 no oil, no leak

I did add oil to the truck before I left to go home.

No oil on the motor anywhere and none on the ground. Thanks

This is a hard one to diagnose, but have you considered that you may have a large oil leak that is dripping onto a heated engine component and cooking off, thus not leaving a leak under the truck or on the motor itself? Did you happen to look and see if there was any smoke coming from behind your truck? In your picture, it's night so it may have been impossible to really see but that would be my guess. Oil has to go somewhere, and if it is not leaking on the ground and not visible on the motor, there's really only two options: it's either burning off, or it's going places it is not supposed to go inside the engine. I think your best bet here is to get it to a mechanic as you'll really want to have the system pressure tested to see if it's holding oil or if the PSI is falling under load/at idle. Another option would be to put oil in it, let it idle, and crawl around under it to see if you see any oil dripping on the pipes, manifold, or see any smoke.

Just got it back from mechanic. Flushed the system and put new dextos synthetic in. There was no smoke and no oil in tail pipe. Mechanic said the oil was really black, now that's even after I added the 4 quarts last night after I saw there was none. So driving it an hour last night until it died again and the oil looked that bad this morning. The truck used to hold pressure at or right below 40. After the flush now it's around 48 when I drove it to my house. That oil had to go some where. Called Chevy dealer and they have never heard of this happening which surprises me from the post I have seen. Also, just so happen a guy pulled up this morning at the shop and he has a 2017 gmc with 30k miles on it and he said his did the exact same thing as mine. He got his oil changed and noticed the next day the same message that I got about low oil level and shut off engine. He said there was no oil in his truck and he blamed it on the place who changed his oil but now he said he was wrong if mine just did the same thing. Where does 6 quarts of oil go that fast? Slow burn off etc...

I wouldn't trust a GM dealer any further than I can throw their entire dealership, and that's coming from an ex-GM employee who worked for them for over a decade. Losing oil that fast is definitely, and obviously, not normal. The fact that the oil is darkening so quick means it is likely getting exposed to a.) contaminants or b.) high heat. Have you noticed any change in the operating temperature before the truck cuts out? Is it running hotter than around 180 degrees? Something else that crossed my mind, and it's a long shot I admit, is that it could be something to do with the detergents in the tank of gas IF you are still running the same tank. As for why the oil is being burnt off, that I am not sure. Sorry to hear you are still having these issues despite taking correct steps to remedy the problem.