2002 GMC Envoy Owner's Manual - Page 18

Head Restraints Rear Seats Your vehicle has a folding rear seat which lets you fold the seatbacks down for more cargo space. Slide the head restraint up or down so that the top of the restraint is closest to the top of your head. This position reduces the chance of a neck injury in a crash. On some models, the head restraints tilt forward and rearward also. The head restraints lock into place when raised. To release the head restraint and lower it, press the tab located on the top of the seatback. Pull up on the tab located where the seat cushion meets the seatback to fold the seat cushion up and out of the way. This will allow the seatback to fold flat and increase the cargo area. 1-6