Second Row; Third Row - GMC Yukon Denali 2003 Owner's Manual

Second Row

The center seat position in the second row has a
lap-shoulder belt which works the same way as the
safety belt in the rear outside seat positions. For
instructions on how to secure a child restraint using a
lap-shoulder belt see Securing a Child Restraint in
a Rear Outside Seat Position on page 1-63 .

Third Row

The center seat position in the third row has a lap belt.
Be sure to follow the instructions that came with the
child restraint. Secure the child in the child restraint
when and as the instructions say.
1-66
1. Make the belt as long as possible by tilting the latch
plate and pulling it along the belt.
2. Put the restraint on the seat.
3. Run the vehicle's safety belt through or around the
restraint. The child restraint instructions will show
you how.