1995 Buick Riviera Owner's Manual - Page 37

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. Lap-Shoulder Belt The positions next to the windows have lap-shoulder belts. Here's howto wear one properly. 1-26