2008 Toyota Tundra Owners Manual - Page 255

07 11.20 To turn off: Push "TOW/HAUL" switch once again and the "TOW/HAUL" mode indicator light goes off. "TOW/HAUL" mode is canceled by pressing "TOW/HAUL" switch again or by turning the engine switch to "OFF". Even when "TOW/HAUL" mode is used during normal driving, no damage is caused to the engine or the transmission. However, fuel economy is reduced and the transmission and/or engine driving characteristics may feel unusual. Toyota recommends using "TOW/HAUL" mode only when a heavy trailer or a large heavy load is towed. 225 2008 TUNDRA from Apr. '08 Prod. (OM34477U)