GMC Acadia 2011 Owner's Manual page 419

3. Make sure the floor mat is
properly secured and verify that
it does not interfere with the
accelerator or brake pedals.
Knob Retainer
Floor mats with a knob retainer.
Removing and Replacing the
Floor Mat
1. Turn the knob until it is aligned
with the slot in the floor mat
grommet.
2. Pull up on the floor mat.
3. Center the slot in the floor mat
grommet with the knob on the
floor and set into position.
4. Turn the knob until it is
perpendicular to the slot in the
grommet to lock the mat in
place.
5. Make sure the floor mat is
properly secured and verify that
it does not interfere with the
accelerator or brake pedals.
Vehicle Care 10-101