GMC Sierra Owners Manual
Seat AdjustmentIn Brief / Initial Drive Information / Seat Adjustment
Manual Seats
To adjust the seat:
1. Lift the bar to unlock the seat.
2. Slide the seat to the desired position and release the bar.
3. Try to move the seat back and forth to be sure the seat is locked in place.
See Seat Adjustment on page 3‑3 for more information.
Power Seats
To adjust a power seat, if equipped:
• Move the seat forward or rearward by sliding the control forward or rearward.
• If available, raise or lower the front or rear part of the seat cushion by moving the front or rear of the control up or down.
• If available, raise or lower the entire seat by moving the entire control up or down.
Lumbar Adjustment
If equipped, increase or decrease manual lumbar support by turning the knob forward or rearward.
See Lumbar Adjustment on page 3‑4 for more information.
To adjust the power lumbar support, if equipped:
• On vehicles with two-way lumbar, press and hold the top or bottom of the control to increase or decrease lumbar support.
• On vehicles with four-way lumbar, press and hold the front or rear of the control to increase or decrease lumbar support. To raise or lower the height of the support, press and hold the top or bottom of the control.
See Lumbar Adjustment on page 3‑4 for more information.
Reclining Seatbacks
To recline a manual seatback:
1. Lift the lever.
2. Move the seatback to the desired position, and 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.
See Reclining Seatbacks on page 3‑5 for more information.
To adjust a power seatback, if equipped:
• Tilt the top of the control rearward to recline.
• Tilt the top of the control forward to raise.
See Reclining Seatbacks on page 3‑5 for more information.
