1996 Chevrolet Express Van Owner's Manual - Page 90

CAUTION: It can be dangerous to drivewith the rear swing-out windows or reardoor(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 rearswing-out windows or reardoor(s) open or if electrical wiring or other cable connections must pass through theseal between the body and the rear swing-out windows or reardoor(s): Make sure all windows are shut. CAUTION: (Continued) CAUTION: (Continued) Turn the fan on your heating or cooling system to itshighest speed with the setting on VENT, HEAT, BLENDor DEF. Additionally, on vehicles with heatingair conditioning systems, NORM A/C or BI-LEV A/C can be used. That will force outside air into your vehicle. See"Comfort Controls" in the Index. If you have air outlets on or under the instrument panel, open them all the way. See "Engine Exhaust" in the Index. Horn Press one of the horn buttons at each side of the steering wheel to sound the horn. 2-28