GMC 2002 Envoy - Manual (Page 18)

1-6
Head Restraints
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.
Rear Seats
Your vehicle has a folding rear seat which lets you fold
the seatbacks down for more cargo space.
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.