2013 Toyota Tundra Regular Cab Owners Manual - Page 113

1-7. Safety information Installation with LATCH system (CrewMax models) If the child restraint has a top tether strap, the top tether strap should be latched onto the top tether strap anchor. (→P. 161) Fold down the seatback and back to the 1st lock position (most upright position) until it locks into place. Adjust the seatback to the 8th lock position. (→P. 65) 1st lock position 8th lock position 148