2002 GMC Sonoma Owner's Manual - Page 11

Horizontal Control: Raise or lower the front of the seat by raising or lowering the forward edge of the control. Raise or lower the rear of the seat by raising or lowering the rear edge of the control. Move the seat forward or rearward by moving the whole control toward the front or the rear of the vehicle. Moving the whole control up or down raises or lowers the whole seat. Vertical Control: Move the reclining front seatback forward or rearward by moving the control toward the front or rear of the vehicle. Power Lumbar Control (If Equipped) If your vehicle has this feature, there will be a control located on the outboard side of the front seat(s). Press and hold the front of the control until you have the desired lumbar support. To decrease lumbar support, press and hold the rear of the control. 1-4