2001 Chevrolet Express Van Owner's Manual - Page 93

Rear Doors 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. To open the rear doors from the outside, pull the handle towards you to open the passenger's side rear door first. 2-16