Chevrolet 2000 Express Van Owner's Manual page 108

Rear Swing
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Your rear swing out windows work the same way, but
the latch is at the bottom edge of the window.
2-32
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Out Window
CAUTION:
It can be dangerous to drive with the rear
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swing out windows or rear door(s) open because
carbon monoxide (CO) gas can come into your
vehicle. You can't see or smell CO. It can cause
unconsciousness and even death.
If you must drive with the rear swing
windows or rear door(s) open or if electrical
wiring or other cable connections must pass
through the seal between the body and the rear
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swing out windows or rear door(s):
D
Make sure all windows are shut.
D
Turn the fan on your heating or cooling
system to its highest speed with the setting
on VENT, HEAT, BLEND or DEF.
Additionally, on vehicles with heating/air
conditioning systems, NORM A/C or
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BI LEVEL A/C can be used. That will
force outside air into your vehicle. See
"Comfort Controls" in the Index.
D
If you have air outlets on or under the
instrument panel, open them all the way.
See "Engine Exhaust" in the Index.
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