thomasplusdlisaforever according to my list, the interchangeability is within these models:
2009 – 2016 GMC Acadia
2009 – 2016 Buick Enclave
2010 – 2011 Buick LaCrosse
2009 – 2016 Chevrolet Traverse
Confirmed are the 2012
CHEVROLET TRAVERSE
GMC ACADIA
Best person to ask would be you local "recycler" or anyone with the Hollander Interchange Manual
That does not necessarily mean that they are straight drop-ins. You may have to change brackets and mountings etc.