My 2017 terrain motor just blew. Oil change in September 2023 by November oil light was be back on. Checked it in January and it was a low. I added a quart and it was back to normal range. A couple of weeks later I had the oil changed. Then I downloaded the mygmc app and after 3 weeks it said the oil life was at 49%. A week lol later it blew. Sounded like all the internal parts of the engine fell apart when I tried to turn it over.Of course it's tough to know the full story on the vehicle, but the OP stated she got dealer documented oil changes done every 3000 miles or less.
Could it be possible it burned THAT much oil that it still smoked the engine with that oil change regimen?
Nothing but clanking.