I was having the same issue in my 2013 Acadia. Took it to the dealership and I have to replace the oil pump. Very expensive! But it has to be done.
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I was having the same issue in my 2013 Acadia. Took it to the dealership and I have to replace the oil pump. Very expensive! But it has to be done. When they replace the oil pump they have to redo the timing and everything so if you are having any issues I would take it in to a dealership that knows the vehicle and have them check. I was getting the low oil pressure turn off engine message even after oil change. There wasn't a code to run since it would happen whenever.