2013 Toyota Tundra Regular Cab Owners Manual - Page 446
2013 Toyota Tundra Regular Cab Manual
Page 446 highlights
3-7. Using the storage features Auxiliary boxes Front bench type seat (type B) Pull the lever up and fold down the seatback. Push the knob and lift the lid. Front bench type seat (type C) Pull the lever up and fold down the seatback. 484