2011 Toyota Tundra Double Cab Owners Manual - Page 518

3-8. Other interior features Seat heaters∗ On The indicator comes on. Adjusts the seat temperature. The further you turn the dial upward, the warmer the seat becomes. n The seat heaters can be used when The engine switch is in the ON position. n When not in use Turn the dial fully downward. The indicator turns off. ∗: If equipped 492