GMC 2004 Savana Van Owner's Manual page 37

3. Be sure the belt is not twisted and it lies flat. The
elastic cord must be under the belt and the guide
on top.
4. Buckle, position and release the safety belt as
described in Rear Seat Passengers on page 1-26.
Make sure that the shoulder belt crosses the
shoulder.
To remove and store the comfort guides, squeeze the
belt edges together so that you can take them out of
the guides.
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