2013 Toyota Tundra CrewMax Owners Manual - Page 274
2013 Toyota Tundra CrewMax Manual
Page 274 highlights
3-1. Using the air conditioning system and defogger Front passenger side outlets Direct air flow to the left or right, up or down. Turn the knob to open or close the vent. Rear outlets (CrewMax models only) Direct air flow to the left or right, up or down. Turn the knob to open or close the vent. 312