GMC 2010 Yukon XL Denali Owner's Manual page 100

Use the following pictures to determine the latch
plate style:
Free Falling Latch Plate
Cinching Latch Plate
2-68
1. Put the child restraint on the seat.
2. Pick up the latch plate, and run the lap and
shoulder portions of the vehicle's safety belt
through or around the restraint. The child restraint
instructions will show you how.
For third row seating positions, with cinching
latch plates, tilt the latch plate to adjust the
belt if needed.