Lumbar Adjustment

Power Lumbar

Eight-Way Power Seat Shown, Four-Way Similar

Eight-Way Power Seat Shown, Four-Way Similar

A. Lumbar Switch

If available, press and hold the front or rear of the switch (A) to increase or decrease lumbar support. Release the switch when the seatback reaches the desired level of lumbar support.

    See also:

    Radio(s)
    Radio with USB, CD, and DVD (MP3) : Press to turn the system on and off. Turn to increase or decrease the volume. BAND: Press to choose between FM, AM, or XM™, if equipped. : Select ra ...

    Vehicle Personalization
    The audio system controls are used to access the personalization menus for customizing vehicle features. CONFIG (Configuration): Press to access the Configuration Settings Menu. MENU/SELECT Knob: ...

    Overview
    The GMC Sierra All Terrain HD concept is an exploration of heavy-duty truck capability combined with greater off-road versatility. It is highlighted by a bold exterior design, enhanced all-terrain ...