Head Restraints
The front outside seats of your vehicle have adjustable head restraints.

Adjust the head restraint so that the top of the restraint is at the same height as the top of the occupant's head. This position reduces the chance of neck injury in a crash.
Front Seats
The front outside seats of your vehicle have adjustable head restraints.

The height of the head restraint can be adjusted.
To raise or lower the head restraint, press the button located on the side of the head restraint and pull up or push down the head restraint, then release the button. Pull and push the head restraint after the button is released to make sure it is locked in place.
Front seat head restraints are not removable.
Rear Seats
Rear Head Restraint Adjustment
The rear outside seats of your vehicle have adjustable head restraints.
The height of the head restraint can be adjusted. Pull the head restraint up to raise it. Try to move the head restraint to make sure it is locked in place.

To lower the head restraint, press the button located at the top of the seatback and push the head restraint down. Try to move the head restraint after the button is released to make sure it is locked in place.
Folding the Rear Head Restraint
The head restraint can be folded down to provide better visibility when the rear seat is not occupied.

To fold the head restraint, press the button on the side of the head restraint.

The head restraint folds down automatically.
When a passenger or child restraint is in the seat, always return the head restraint to the fully upright position. Pull the head restraint up and forward until it locks in place. Press and pull the head restraint to make sure it is locked.
Always adjust the head restraint so that the top of the restraint is at the same height as the top of the occupant's head.
Rear outside head restraints are not removable.
Test yourself
A quick GMC Terrain quiz: every answer comes with an explanation and a link to the manual page.