2010 GMC Canyon Extended Cab Owner's Manual - Page 77

For crew cab models, there are exposed metal lower anchors for each rear outboard seating position, located where the seatback meets the back of the seat cushion. For extended cab models with rear seats, there are exposed metal lower anchors for each rear seating position, attached to the back wall, near the seat cushion. To assist you in locating the lower anchors, place your hand in a palm-up position and reach up between the seat cushion and the seatback. To assist you in locating the top tether anchors, the top tether anchor symbol is located on the cover. 2-49