Head Restraints - GMC 1999 Sierra 1500 Pickup Owner's Manual

Head Restraints
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Slide the head restraint up or
down so that the top of the restraint is closest
to the top of your ears.
This position reduces the chance of a neck injury in a crash.
Seatback Latches (Full Bench Seat)
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The front seatback folds forward to let you access the rear of the cab. Your
seatback will move back and forth freely, unless you come to a sudden stop.
Then it will lock in place.
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