2007 GMC Yukon Owner's Manual - Page 79

For vehicles with a three passenger third row seat, there is one top tether anchor located at the bottom rear of the seat cushion that can be used for the third row center or driver side seating positions. Never install two top tethers using the same top tether anchor. Do not secure a child restraint in the right front passenger position or the third row passenger side seating position if your vehicle has a third row seat, if a national or local law requires that the top tether be attached, or if the instructions that come with the child restraint say that the top tether must be attached. There is no place to attach the top tether in these positions. Accident statistics show that children are safer if they are restrained in the rear rather than the front seat. See Where to Put the Restraint on page 72 for additional information. 79