2006 GMC Yukon Owner's Manual - Page 71

2. If the child restraint manufacturer recommends that the top tether be attached, attach and tighten the top tether to the top tether anchor, if equipped. Refer to the child restraint instructions and the following steps: 2.1. Find the top tether anchor. 2.2. Route, attach and tighten 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 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. 3. Push and pull the child restraint in different directions to be sure it is secure. 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. 1-65