2003 Chevrolet Impala Owner's Manual - Page 100
2003 Chevrolet Impala Manual
Page 100 highlights
Parking Over Things That Burn Engine Exhaust L..gine exhaust can kill. It conta-- 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. 0 Your vehicle or exhaust system had been modified improperly. @ I Things that can burn could touch hot exhaust parts under your vehicle and ignite. Don't park over papers: leaves: dry grass or other things thatcanburn. I 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. 2-31