Toyota 2006 Tundra Owner's Manual page 325

'06 TUNDRA_U (L/O 0508)
Rear vents (double cab models only)
If air flow control is not satisfactory, check
the instrument panel and rear vents. The
instrument panel and rear vents may be
opened or closed as shown.
For removing frost or fog, it is recom-
mended that you close the lower vent
when using the "Floor", "Floor/Windshield"
or "Windshield" mode.
314
2006 TUNDRA from Oct. '06 Prod. (OM34458U)