Chevrolet 2000 Tahoe Owner's Manual page 65

Suburban/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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Suburban/Yukon XL models with rear seats: A child
restraint with a top strap should only be used in the
second or third row. Don't use a child restraint with a
top strap in the front seat because there's no place to
anchor the top strap.
An anchor loop bracket for a top strap is located at the
bottom rear of the seat cushion for each seating position
in the second row, and for the right outside seating
position in the third row.
Suburban/Yukon XL Second Row Seat