GMC 2007 Envoy - Manual (Page 62)

1.3. Put the child restraint on the seat.
1.4. Attach and tighten the lower
attachments on the child restraint
to the lower anchors.
2. If the child restraint manufacturer recommends
that the top tether be attached, attach and
tighten the top tether to the top tether anchor,
if equipped. Refer to the child restraint
instructions and the following steps:
2.1. Find the top tether anchor.
2.2. Route and tighten the top tether
according to your child restraint
instructions and the following
instructions. If your vehicle has a cargo
shade, route the top tether between
the seatback and the cargo shade.
If the position you
are using does not
have a head restraint
and you are using
a single tether, route
the tether over
the seatback.
If the position you
are using does not
have a head restraint
and you are using
a dual tether, route
the tether over
the seatback.
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