GMC 1998 Savana Van Owner's Manual page 104

Swing-Out Windows
Rear Swing-Out Window
Side Swing-Out Window
To open your side door swing-out windows, pull up on
the latch at the edge of the window and swing the
window out and push down the latch into the locked
open position.
To close the window, pull the latch toward you and push
down on the latch
to
lock
it.
Your rear swing-out windows work the same way, but
the latch is at the bottom edge of the window.
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