RAM 2013 CHASSIS CAB 3500 Owner's Manual page 103

Any seat belt system will loosen with time, so check the
belt occasionally, and pull it tight if necessary.
If the buckle or the cinching latch plate is too close to the
belt path opening of the child restraint, you may have
trouble tightening the seat belt. If this happens, discon-
nect the latch plate from the buckle and twist the short
buckle-end belt up to three full turns to shorten it. Insert
the latch plate into the buckle with the release button
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 101
facing out, away from the child restraint. Repeat steps 4
to 6, above, to complete the installation of the child
restraint.
If the belt still cannot be tightened after you shorten the
buckle, disconnect the latch plate from the buckle, turn
the buckle around one half turn, and insert the latch plate
into the buckle again. If you still cannot make the child
restraint installation tight, try a different seating position.
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