lumbar support GMC C-SERIES 1999 Owners Manual

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To adjust the height of the
cushion, lift the cushion
height adjustment handle up
and forward. You can
choose between two
settings. The handle is
located underneath the seat,
in the front.
Lumbar Adjustments
To get more support in the
lumbar area of your back,
turn the lumbar adjustment
knob. The knob is located
on the upper cushion, on the
inboard side of the driver's
seat and the outboard side
of the passenger's seat.Seatback Adjustment
To tilt the seatback, turn the
backrest tilt knob. The knob
is located on the lower
cushion, on the outboard
side of the driver's seat and
the inboard side of the
passenger's seat.
Fore
-and-Aft Adjustment
To slide the seat forward or
backward, move the lever
toward the passenger's side.
The seat will lock in at
1/2 inch (1.5 cm)
increments. The lever is
located underneath the seat,
in the front.
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