Buick 2008 Allure Owner's Manual page 47

The top tether anchors are located under the covers
on the rear seatback filler panel. Flip open the cover
to access the anchors. 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.
To assist you in locating
the top tether anchors,
the top tether anchor
symbol is located
on the cover.
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 1-38 for
additional information.
1-43