GMC Sierra Owners Manual

Lumbar Adjustment
Seats and Restraints / Front Seats / Lumbar Adjustment

Manual Lumbar

GMS Sierra: Lumbar Adjustment. Manual Lumbar
Manual Lumbar

If equipped, increase or decrease manual lumbar support by turning the knob forward or rearward.

Power Lumbar

GMS Sierra: Lumbar Adjustment. Power Lumbar
Power Lumbar

To adjust the power lumbar support, if equipped:

Х On vehicles with two-way lumbar, press and hold the top or bottom of the control to increase or decrease lumbar support.

Х 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.


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