2004 Chevrolet Monte Carlo Owner's Manual - Page 155

Emissions Inspection and Maintenance Programs Some state/provincial and local governments have or may begin programs to inspect the emission control equipment on your vehicle. Failure to pass this inspection could prevent you from getting a vehicle registration. Here are some things you need to know to help your vehicle pass an inspection: Your vehicle will not pass this inspection if the Check Engine light is on or not working properly. Your vehicle will not pass this inspection if the OBD (on-board diagnostic) system determines that critical emission control systems have not been completely diagnosed by the system. The vehicle would be considered not ready for inspection. This can happen if you have recently replaced your battery or if your battery has run down. The diagnostic system is designed to evaluate critical emission control systems during normal driving. This may take several days of routine driving. If you have done this and your vehicle still does not pass the inspection for lack of OBD system readiness, your GM dealer can prepare the vehicle for inspection. Oil Pressure Indicator Light The oil pressure indicator tells you if you have the correct oil pressure in your engine to operate your vehicle. 3800 V6 Engine Under normal conditions the indicator should read slightly above the half way point. If your oil pressure falls too low, the indicator will read at the low setting in the red zone. 3-41