Chevrolet 2001 Express Van Owner's Manual page 82

CAUTION:
It can be dangerous to drive with the rear door(s)
-
or rear swing out windows 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 door(s) or rear
-
swing out windows open or if electrical wiring or
other cable connections must pass through the
seal between the body and the rear door(s) or
-
rear swing out windows:
D
Make sure all other windows are shut.
D
Turn the fan on your heating or cooling
system to its highest speed with the setting
on VENT, HEAT, or DEFOG.
Additionally, on vehicles with heating/air
conditioning systems, NORM A/C or
-
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.
Keys
CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons. A child or
others could be badly injured or even killed.
They could operate the power windows or
other controls or even make the vehicle move.
Don't leave the keys in a vehicle with children.
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