To answer your question, the Acadia is different than 2019+ Chevy/GMC 1500 trucks. IF it uses the same electrical architecture it's possible that info may transfer there, but I don't know the answer for those and have not done any research for those.
If you want my info about Silverado/GMC here it is. From my understanding of the GM electronics and diagrams along with tons of research, IF you have a VPM already (a truck equipped with 2 or more cameras) you can easily (very time consuming) add more cameras. If you only have one camera (backup), you DO NOT have a VPM and it is questionable if you can add it. (If possible, it would be very difficult, time consuming, and expensive.) I don't have one and am trying to see if its possible at all. I have never heard if anyone has tried it.