Toyota 2009 Tundra Owner's Manual page 100

Removing the rear head restraints
n
Double Cab models
CrewMax models
Adjusting the height of the head restraints
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n Adjusting the front center seat (bench type seat) and rear center seat
head restraints (Double Cab and CrewMax models)
Always raise the head restraint one level from the stowed position when
using.
1-3. Adjustable components (seats, mirrors, steering wheel)
Pull the head restraint up while pushing
the lock release button.
Pull the head restraint up while pushing
the lock release button.
Make sure that the head restraints are
adjusted so that the center of the head
restraint is closest to the top of your ears.
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