GMC 1998 Savana Van Owner's Manual page 16

10. For the first rear seat, stow the safety belt latch by
attaching the fastener strip on the safety belt latch
to the trim just inside the side door. There is also a
fastener strip provided for stowing the safety belt
latch for a four-passenger bench seat, if equipped.
For the remaining rear seats, stow the safety belt
latch plate on the clip at the window trim.
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