GMC 1999 Suburban, Owner'S Manual, Page: 8 / 424

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Seats and Seat Controls
This section tells you about the seats
--
how to adjust
them and fold them up and down. It also tells you about
reclining front seatbacks and head restraints.
Manual Front Seat
CAUTION:
You can lose control of the vehicle if you try to
adjust a manual driver’s seat while the vehicle is
moving. The sudden movement could startle and
confuse you, or make you push a pedal when you
don’t want to. Adjust the driver’s seat only when
the vehicle is not moving.
If your vehicle has a manual
bucket, split bench or full
bench seat, you can adjust it
with this lever at the front
of the seat.
Slide the lever at the front of the seat toward the
passenger’s side to unlock it. Using your body, slide the
seat to where you want it. Then, release the lever and try
to move the seat with your body to make sure the seat is
locked into place.