GMC 2003 Yukon Owner's Manual page 62

Tahoe/Suburban/Yukon/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 center seating
position in the third row.
Suburban/Yukon XL Second Row Seat, Bucket
Seats Similar
1-56