I also have a 2016 Malibu Premier 2.0T and have experienced this issue starting from weeks after my purchase when it was brand new. The problem has continuously resurfaced in different time spands from days to months. I am on my 10th time for this issue. I have been told corporate engineers have been consulted, modules replaced, wiring replaced, shift switches replaced and several attempts at reprogramming. It’s absolutely frustrating and is back at a dealership now. I have moved from the original place of purchase and have been to 4 different dealerships with this issue. I think the current dealership is going to try and charge me for this reoccurring issue, so I’m preparing to lawyer up, I’m at my limits and patience is totally exhausted.