Power Seats; Power Lumbar - GMC Sierra 2005 Owner's Manual

Power Seats

If your vehicle has a power seat, you can adjust it with
these controls located on the outboard sides of the seats.
•
Raise or lower the front of the seat cushion by raising
or lowering the forward edge of the horizontal control.
•
Move the seat forward or rearward by moving the
whole horizontal control forward or rearward.
•
Raise or lower the rear of the seat cushion by raising
or lowering the rear edge of the horizontal control.
•
Moving the whole horizontal control up or down
raises or lowers the entire seat cushion.
1-4
If your vehicle has power reclining seats, you can use
the vertical control to adjust the angle of the seatback.
Move the reclining front seatback rearward or forward
by moving the control toward the rear or the front of the
vehicle. See Reclining Seatbacks on page 1-6.

Power Lumbar

Your vehicle's seats may be equipped with power
lumbar.
To increase support, press and hold the front of the
control. To decrease support, press and hold the rear
of the control. Let go of the control when the lower
seatback reaches the desired level of support.
You can increase or
decrease lumbar support
in an area of the lower
seatback with this control,
located on the outboard
sides of the front seat(s).