GMC 2007 Canyon - Manual (Page 60)

The top tether anchors in a crew cab model are
located on the back wall behind each rear seating
position. 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. The top tether anchors in an extended cab model
are located on the center of the back wall
behind a removable cover for the rear seating
positions. Be sure to use an anchor located
nearest to the seating position where the child
restraint will be placed.
Crew Cab Extended Cab — Rear Seat
60