Chevrolet Colorado 2015 Owner's Manual page 97

3-48 Seats and Restraints
2. Press the button for the
passenger side headrest at the
top of the seatback and pull up.
3. Insert the headrest posts into the
holes on the front of the
passenger side seat cushion to
install the seat cushion
extension. The notch on the
posts should face the passenger
side of the vehicle. Try to move
the headrest to make sure it is
locked in place.
4. If the child restraint manufacturer
recommends that the top tether
be attached, adjust the top
tether to its full length and attach
the top tether hook to the
anchor. Refer to the child
restraint instructions and the
following:
Route the top tether (1) through
the loop (2) at the top of the
seatback directly behind the
child restraint and attach the top
tether hook to the top tether loop