Buy 2007 Gmc Sierra 2500 HD 6.0L Vortec V8 A/T 4WD SLE Extended Cab Pickup Seat Lumbar Switch. W/POWER POWER, Dune, Front, Left - OEM Gmc Part # 22891899 (84546255)

Switch. Lumbar. Seat.
Switch used for the adjustment of the Seat Lumbar. adjuster. Knob. Included with: Seat assembly Order by application.

Seat Lumbar Switch

Fits Acadia, Acadia Limited

W/POWER SEAT, SEAT CUSHION, dune.
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.