2002 GMC Sonoma Owner's Manual - Page 17

Jump Seat (Extended Cab Models) Your extended cab pickup has a jump seat in the rear area. Rear Seat (Crew Cab) The rear seatback can be tilted forward to let you reach the area behind it. To tilt the seatback forward, lift up on the lever located at the base of the seatback on the driver's or passenger's side. Then tilt the seatback forward. To fold the jump seat down, pull down on the pull tab on the bottom of the seat until the seat is in place, then move the seatback to a vertical position. To store the seat, fold the seatback down on the cushion, then push the entire seat up until it is flush with the trim panel. Don't let the safety belts be damaged by the hinges or the latches. Safety belts should be folded and stored between the seat cushion and seatback. To return the seatback to the upright position, push the seatback rearward until it latches. After returning the seatback to its upright position, try to pull the seatback forward to make sure it is locked. 1-10