GMC 2001 Safari Owner's Manual page 16

Manual Lumbar Support (If Equipped)
If you have this feature, there will be a knob located
on the inboard side of the driver's and passenger's
bucket seats.
Turn the knob toward the front of the vehicle to increase
lumbar support. Turn the knob toward the rear of the
vehicle to decrease lumbar support.
Power Seat (If Equipped)
If you have this feature, there will be a control pad
located on the inboard side of the driver's seat.
To raise or lower the front of the seat, raise or lower the
lever located toward the front of the vehicle.
To raise or lower the rear of the seat, raise or lower the
lever located toward the rear of the vehicle.
To move the entire seat backwards, forward, or up or
down, move the center knob.
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