Lumbar Adjustment - GMC Sierra Denali 1500 2023 Owner's Manual

To adjust a manual seatback:
1. Lift the lever.
The seatback will automatically fold
forward.
2. To recline, move the seatback rearward
to the desired position, then release the
lever to lock the seatback in place.
3. Push and pull on the seatback to make
sure it is locked.
To return the seatback to the upright
position:
1. Lift the lever fully without applying
pressure to the seatback, and the
seatback will return to the upright
position.
2. Push and pull on the seatback to make
sure it is locked.
Power Reclining Seatbacks
To recline a power seatback, if equipped:
Tilt the top of the control rearward to
recline.
Tilt the top of the control forward to
raise.
Seats and Restraints

Lumbar Adjustment

To adjust the lumbar support, if equipped:
Press and hold the front or rear of the
control to increase or decrease lumbar
support.
If equipped, press and hold the top or
bottom of the control to raise or lower
lumbar support.
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