I have the 2009 version of this engine in my Enclave currently with 70k. Knock wood, so far I have not have the common timing chain issue so many of the early GM 3.6L DI engines had but I change oil often. As noted, a member here has a 2009 Traverse and has used nothing but VWB and has had nothing but good results changing at 5K mile intervals or less. For me I have run Mobil 1, Amsoil Signature Series, Pennzoil Ultra, and Kendall GT full synthetic all in the 5W30 flavor. Based on Blackstone reports my 2009 3.6L DI chews all these oils up long before the recalibrated OLM gets close to 0. Mobil 1 getting chewed up the worse and Kendall GT full synthetic the least. I am using the longer PF-63 filter instead of original PF-48. Interesting is that my vehicle will not use a drop of oil for almost exactly 2K miles and then after that it will use as much as a quart per 1K miles regardless of what brand is being used.
There have been a lot of changes made to the GM 3.6L DI since 2009 but I would not go beyond 5K miles between oil changes whether I had a 2009 or 2017. Additionally, the GM 3.6L DI going in the 2017 GMC Arcadia and Cadillac XT5 are totally new and only share like two part numbers from the previous GM 3.6L DIs. I do not know if the new 3.6L DI is being used in all of the 2017 GM vehicles or not but we will certainly need to see what gremlins luck in the new version of the GM 3.6L.