GMC 1995 Suburban Owner's Manual page 56

Buckle, position and release
it
the same way as the lap part of a
lap-shoulder belt. If the belt isn't long enough, see "Safety Belt Extender"
at the end of this section.
Make sure the release button on the buckle is positioned so you would be
able to unbuckle the safety belt quickly if you ever had to.
Rear Seat Passengers
It's very important for rear seat passengers to buckle up! Accident statistics
show that unbelted people in the rear seat are hurt more often in crashes
than those who are wearing safety belts.
Rear passengers who aren't safety belted can be thrown out of the vehicle in
a crash. And they can strike others in the vehicle who are wearing safety
belts.
Rear Seat Outside Passenger Positions
1-36