One problem related to transmission failure has been reported for the 2012 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 GMC Acadia based on all problems reported for the 2012 Acadia.
Well gm strikes again. I just submitted a transmisson with my 2014 silverado but it looks like my 12 Acadia has the same transmission issue. We bought this Acadia used and within the first year of owning the transmission failed due to a known issue by gm. I almost got rear ended today because the transmission shuttered significantly enough that the car wouldnt go. I am extremely annoyed. I think its time we go to another manufacturer. . . The 35r clutch wave plate is junk and sends metal throughout trans and destroys it.