Toyota 2009 Tundra Owner's Manual page 306

3-1. Using the air conditioning system and defogger
Front passenger side outlets
Rear outlets (CrewMax models only)
282
Direct air flow to the left or
right, up or down.
Turn the knob to open or close
the vent.
Direct air flow to the left or
right, up or down.
Turn the knob to open or close
the vent.