Exhaust System - Chevrolet SUBURBAN 1993 Owner's Manual

Exhaust System
To help prevent damage to your exhaust system, do not continue to drive
your vehicle if you notice:
Engine misfiring
Loss of performance
Other unusual operating conditions
Have your engine and exhaust system serviced regularly.
Three- Way Catalytic Converter
Your vehicle's three-way catalytic converter is designed to reduce the
pollutants in your vehicle's exhaust. Use only unleaded fuel in your vehicle. If
you use leaded fuel, you could damage your three-way catalytic converter,
and other engine components.
Computer Command Control System
This system has an oxygen
(OS) sensor that helps keep your engine's
air-fuel mixture at a proper level. Use only unleaded fuel in your vehicle. If
you use leaded fuel, you could damage your oxygen
(OS) sensor and
three-way catalytic converter.
The Malfunction Indicator Lamp (SERVICE ENGINE SOON) on your
instrument panel lets you know when your emission control system needs
service. The light will come on briefly when you start your engine to let you
know that the system is working. If it does not come on when you start your
engine, or if it comes on and stays on while you're driving your system may
need service. Your vehicle should still be driveable, but you should have your
system serviced right away.
Secondary Air Injection (AIR) System
You may have this system. It lets you know if your engine control module,
wiring harness or solenoid need service. If the Malfunction Indicator Lamp
(Service Englne Soon) comes on, you need service.
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