2009 Toyota Tundra Owners Manual - Page 213

2-1. Driving procedures TOW/HAUL switch (6-speed models with towing package) Use TOW/HAUL mode when pulling a trailer or hauling a heavy load. Floor shift type Press the TOW/HAUL switch. The indicator will come on. Press the switch once more to cancel the mode. 2 When driving Column-shift type 183