2005 GMC Sierra 1500 Pickup Owner's Manual - Page 16

Rear Seat Operation (Crew Cab) The second row rear seat has a 60/40 split seat. Either side of the rear seat may be folded down to give you more cargo space. Make sure that nothing is under or in front of the seat and that the head restraints are completely lowered. To fold the rear seat, do the following: 1. Pull up on the strap loop at the rear of the seat cushion. Then, pull the seat cushion up and fold it forward. 2. After folding the seat cushion fully forward, pull the seatback forward and fold the seatback down until it is flat. If the seatback cannot fold flat because it interferes with the cushion, try moving the front seat forward and/or bringing the front seat more upright. The lever at the base of the seat must be turned rearward to release the seatback. To return the seat to the passenger position do the following: 1. Lift the seatback up and push it rearward all the way. 2. Lower the seat cushion until it latches into position. 3. Pull forward on the seatback and up on the seat cushion to make sure the seat is securely in place. Check to see that the buckles on the driver's side seatback are accessible to the outboard and center occupant and are not under the seat cushions. 1-10