1998 GMC Jimmy Owner's Manual - Page 48

2. Push the latch plate into the buckle until it clicks. Pull up on the latch plate to make sure it is secure. When the shoulder is pulled out all the it belt way, will lock. If it does, let it back all the go way and start again. If the beltis not long enough, see "Safety Belt Extender" atthe 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 you ever had to. if 3. To make the lap part tight, pull down on the buckle end of the belt as you pull up on the shoulderpart. 1-33