The two seats on the left and right have both top tether and lower anchor but the middle seat only has the top teather from our LATCH system. Otherwise you would be able to fit all three of these devices into the 2010 GMC Acadia. If this is not the model year vehicle you are looking for please message me with the correct year so I can give you the correct information. I hope this helps you.
Jeff Morris, GMC Customer Service