2009 GMC Yukon Owner's Manual - Page 52

If the shoulder portion of a passenger belt with a free-falling latch plate is pulled out all the way, the child restraint locking feature may be engaged. If this happens, let the belt go back all the way and start again. Engaging the child restraint locking feature in the right front seating position may affect the passenger sensing system. See Passenger Sensing System on page 1-90 for more information. 3. Push the latch plate into the buckle until it clicks. If you find that the latch plate will not go fully into the buckle, see if you are using the correct buckle. Pull up on the latch plate to make sure it is secure. If the belt is not long enough, see Safety Belt Extender on page 1-53. Position the release button on the buckle so that the safety belt could be quickly unbuckled if necessary. If the belt stops before it reaches the buckle, for lap-shoulder belts with cinching latch plates, tilt the latch plate and keep pulling the safety belt until it can be buckled. 1-46