GMC 2009 Yukon XL Owner's Manual page 75

Second Row Seat — Bucket
For models with bucket second row seating, the top
tether anchors are located at the bottom rear of the seat
cushion for each seating position in the second row.
Be sure to use an anchor located on the same side of
the vehicle as the seating position where the child
restraint will be placed.
Second Row Seat — 60/40
For models with 60/40 second row seating, the top
tether anchors are located at the bottom rear of the seat
cushion for each seating position in the second row.
Be sure to use an anchor located on the same side of
the vehicle as the seating position where the child
restraint will be placed.
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