Chevrolet Tahoe 2015 Owner's Manual page 131

3-62 Seats and Restraints
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.
If the latch plate will not go fully
into the buckle, check to see if
the correct buckle is being used.
Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
4. Pull the shoulder belt all the way
out of the retractor to set the
lock. When the retractor lock is
set, the belt can be tightened but
not pulled out of the retractor.