GMC 2002 Yukon XL Owner's Manual page 78

Securing a Child Restraint in a
Center Rear Seat Position
You'll be using the 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.
See the earlier part about the top strap if the child
restraint has one.
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.
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