2003 GMC 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