2003 GMC Yukon Owner's Manual - Page 63

Tahoe/Yukon models: 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 right front passenger's position, 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 the center seating position in the third row. Third Row Bench Seat 1-57