Oldsmobile 2002 Alero - Manual (Page 38)

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1. Pull the elastic cord out from between the edge
of the seatback and the interior body to remove
the guide from its storage clip.
2. Slide the guide under and past the belt. The elastic
cord must be under the belt. Then, place the guide
over the belt, and insert the two edges of the belt
into the slots of the guide.