2005 GMC Envoy Owner's Manual - Page 109

Engine Exhaust CAUTION: (Continued) {CAUTION: Engine exhaust can kill. It contains the gas carbon monoxide (CO), which you cannot 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 were not done correctly. • Your vehicle or exhaust system had been modified improperly. CAUTION: (Continued) 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. 2-35