Hummer 2008 H2 - Manual (Page 55)

For SUV models with third row seating, the top tether
anchor is located at the bottom rear of the seat cushion
for the passenger side seating position in the third row.
Do not secure a child restraint in a position without a
top tether anchor if a national or local law requires that
the top tether be attached, or if the instructions that
come with the child restraint say that the top tether
must be attached.
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat.
See Where to Put the Restraint on page 1-46 for
additional information.
Second Row Seats — SUT
Third Row Seat — SUV
1-51