2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 101

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 2‑47. 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. 3. 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. For crew cab second row seatings positions, tilt the latch plate to adjust the belt if needed. 2-59