GMC 2002 Yukon XL Owner's Manual page 70

In Canada, the law requires that forward
restraints have a top strap, and that the strap be
anchored. In the United States, some child restraints
also have a top strap. If your child restraint has a top
strap, it should be anchored.
Anchor the top strap to one of the following anchor
points. Be sure to use an anchor point located on the
same side of the vehicle as the seating position where
the child restraint will be placed. If you have an
adjustable head restraint, route the top strap under it.
Once you have the top strap anchored, you'll be ready to
secure the child restraint itself. Tighten the top strap
when and as the child restraint manufacturer's
instructions say.
-
facing child Tahoe/Suburban/Yukon/Yukon XL models without
rear seats: Top strap anchor loops are located at the
bottom rear of the front seat cushion for the right front
passenger's position.
Suburban/Yukon XL Models without Rear Seats
Anchor the top strap to this bracket. Once you have the
top strap anchored, you'll be ready to secure the child
restraint itself.
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