2007 Chevrolet Avalanche Owner's Manual - Page 61

1.3. Route the top tether according to your child restraint instructions and the following instructions: If the position you are using does not have a head restraint and you are using a single tether, route the tether over the seatback. If the position you are using has an adjustable head restraint and you are using a dual tether, route the tether around the head restraint. If the position you are using does not have a head restraint and you are using a dual tether, route the tether over the seatback. If the position you are using has an adjustable head restraint and you are using a single tether, raise the head restraint and route the tether under the head restraint and in between the head restraint posts. 1.4. Attach the top tether attachment to the top tether anchor. 61