GMC C-Series 2001, Owner'S Manual, Page: 12 / 324

1-5
Height Adjustment
To adjust the height of a
self
-
contained seat
(hand
-
pumped air seat),
push the seat height
adjustment pump lever,
located on the lower
outboard side, down and
continue pumping to raise
the seat. Press the lever and
hold it to lower the seat.
To adjust the height of air
-
sourced seats, use the knob
on the front outboard side of the seat. Push the knob to
inflate. Pull the knob to deflate.
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.