1995 Chevrolet Blazer Owner's Manual - Page 124

Malfunction Indicator Lamp (SERVICE ENGINE SOON Light) I SERVICE ENGINE SOON The amber Malfunction Indicator Lamp (SERVICE ENGINE SOON Light) is located at the top of your instrument panel. A computer monitors operation of your fuel, ignition and emission control systems. This light should come on when the ignition on, but the engine is is not running, as a check to show you it working. If it does not comeon at is all, have it fixed right away. If it stays on, or it comeson while you are driving, the computeris indicating that you have a problem.You should take your vehicle in for servicesoon. NOTICE: If you keep driving your vehicle with this light on, after awhile the emission controls won't work well, your fuel economy as won't be as good and your engine may not run smoothly.This as could lead to costly repairs not covered by your warranty. If Your Vehicle is Equipped with 8 D 11 0 Certain vehicles are equipped with a new emission diagnostic system. You can tell whether your vehicle has this system by reading your tune-up label located under the hood.If the label says "OBD11" on it, the following instructions apply. Malfunction Indicator Lamp (SERVICE ENGINE SOON Light) Your vehicle is equipped with onboard computer which monitors an This system is called OBD I1 operation of the emission control system. (On-Board Diagnostics-Second Generation) and is intendedto assure that emissions are at acceptable levels for the of the vehicle, helping to life produce a cleaner environment.The "SERVICE ENGINESOON' light comes on to indicate when service is required. Malfunctions often will be 2-72