2010 Hummer H3 Owner's Manual - Page 104

3-60 Seats and Restraints If more than one child restraint needs to be installed in the rear seat, be sure to read Where to Put the Restraint on page 3‑49. 1. Put the child restraint on the seat. 2. Pick up the latch plate, and run the lap and shoulder portions of the vehicle's safety belt through or around the restraint. The child restraint instructions will show you how. 4. Push the latch plate into the buckle until it clicks. Position the release button on the buckle so that the safety belt could be quickly unbuckled if necessary. 5. For H3 models, pull the rest of the shoulder belt all the way out of the retractor to set the lock. 3. For H3T models, tilt the latch plate to adjust the belt if needed.