Chevrolet 2000 C-Series Owner's Manual page 11

National Seats (If Equipped)
If your vehicle has the low
six ways you can adjust the seat.
If your vehicle has the high
five ways you can adjust the seat.
1-4
-
back National seat, there are
-
back National seat, there are
Height Adjustment
To adjust the height of air
on the front left side on the seat. Push the knob to
inflate. Pull the knob to deflate.
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.
-
sourced seats, use the knob