Buy 2007 Gmc Sierra 2500 HD 6.0L Vortec V8 A/T 4WD SLE Extended Cab Pickup Seat Lumbar Switch. Regal Power, Right, CUSHION - OEM Gmc Part # 39010085

Switch. Lumbar. Seat.
Switch used for the adjustment of the Seat Lumbar. adjuster. Knob.

Seat Lumbar Switch

Fits Regal Sportback, Regal TourX

Regal Sportback; Right. Regal TourX; Right. W/POWER, W/4-WAY LUMBAR, W/O SPORT SEAT. W/SPORT SEAT, SEAT CUSHION.
Power Lumbar Switch - Repair or Replace
If your power lumbar doesn't move, your power lumbar switch may be the culprit. Have a technician inspect your 2007 GMC Sierra 2500 HD to see if your the switch needs to be replaced.