GMC 2003 C4C042 Owner's Manual page 10

Split Bench Seat (If Equipped)
If your vehicle has a split bench seat, your seat is fixed
and is not able to be adjusted.
Air Suspension Seats (If Equipped)
If your vehicle has the low
are six ways you can adjust the seat.
If your vehicle has the high
there are five ways you can adjust the seat.
-
back suspension seat, there
-
back air suspension seat,
Height Adjustment
To adjust the height of the air suspension seat, pull the
lever up to inflate. Push the lever down to deflate.
The seat cushion itself can also be raised or lowered.
The suspension seat height
adjustment lever is located
on the front inboard side of
the seat.
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