2003 GMC Envoy Owner's Manual - Page 31

Lap-Shoulder Belt All rear seating positions have lap-shoulder belts. Here's how to wear one properly. When the shoulder belt is pulled out all the way, it will lock. If it does, let it go back all the way and start again. If the belt is not long enough, see Safety Belt Extender on page 7-29. 1. Pick up the latch plate and pull the belt across you. Don't let it get twisted. 2. Push the latch plate into the buckle until it clicks. Pull up on the latch plate to make sure it is secure. 3. To make the lap part tight, pull up on the shoulder part. 1-24