2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 48

Your vehicle may have additional features to adjust your vehicle's power seat: . Manual Lumbar Raise or lower the front part of the seat cushion by moving the front of the control up or down. Raise or lower the rear part of the seat cushion by moving the rear of the control up or down. Raise or lower the entire seat by moving the entire control up or down. . . On seats with power reclining seatbacks, the control is located behind the power seat control on the outboard side of the seats. See "Power Reclining Seatbacks" under Reclining Seatbacks on page 2‑10. A vehicle with a memory function allows seat settings to be saved and recalled. See Memory Seat, Mirrors, and Pedals on page 2‑8 for more information. On vehicles with this feature the control is located on the outboard side of the seat. Increase or decrease lumbar support by turning the knob forward or rearward. 2-6