2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 17

In Brief Power Seats . 1-11 If available, raise or lower the entire seat by moving the entire control up or down. Power Lumbar See Power Seat Adjustment on page 3‑5 for more information. Lumbar Adjustment Manual Lumbar To adjust a power seat, if equipped: . Move the seat forward or rearward by sliding the control forward or rearward. If available, raise or lower the front or rear part of the seat cushion by moving the front or rear of the control up or down. To adjust the power lumbar support, if equipped: . . On vehicles with two-way lumbar, press and hold the top or bottom of the control to increase or decrease lumbar support. If equipped, increase or decrease manual lumbar support by turning the knob forward or rearward. See Lumbar Adjustment on page 3‑7 for more information.