2003 Chevrolet Tahoe Owner's Manual - Page 129

Enciqe Exhaust m Running Your Engine While You Are Parked It's better not to park with the engine running. But if you ever have to '?ere are some thi7gs to know Engine exhaust can kill. It contains the gas carbon monoxide (CO), which you can't see or smell. It can cause unconsciousness and death. You might have exhaust coming in if: Your exhaust system sounds strange or different. Your vehicle gets rusty underneath. Your vehicle was damaged in a collision. Your vehicle was damaged when driving over high points on the road or over road debris. Repairs weren't done correctly. Your vehicle or exhaust system had been modified improperly. If you ever suspect exhaust is coming into your vehicle: Drive it only with all the windows down to blow out any CO; and Have your vehicle fixed immediately. Idling the engine with the climate control system off could allow dangerous exhaust into your vehicle. See the earlier Caution under "Engine Exhaust." Also, idling in a closed-in place can let deadly carbon monoxide (CO) into your vehicleeven if the fan is the highest setting. One place at this can happen is agarage. Exhaust - with CO - can come in easily. NEVER park in a garage with the engine running. Another closed-in place can be a blizzard. See "Winter Driving" in theIndex. 2-40