Malfunction Indicator Lamp
Check Engine Light
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for the life
of the vehicle, helping to produce a cleaner environment.
The Check Engine light comes on to indicate that there is
a problem and service is required. Malfunctions often will
be indicated by the system before any problem is
apparent. This may prevent more serious damage to your
vehicle. This system is also designed to assist your
service technician in correctly diagnosing any
malfunction.
Notice: If you keep driving your vehicle with this
light on, after a while, your emission controls may
not work as well, your fuel economy may not be as
good and your engine may not run as smoothly. This
could lead to costly repairs that may not be covered
by your warranty.
Notice: Modifications made to the engine,
transmission, exhaust, intake or fuel system of your
vehicle or the replacement of the original tires
with other than those of the same Tire Performance
Criteria (TPC) can affect your vehicle’s emission
controls and may cause this light to come on.
Modifications to these systems could lead to costly
repairs not covered by your warranty. This may
also result in a failure to pass a required Emission
Inspection/Maintenance test.
This light should come on, as a check to show you it is
working, when the ignition is on and the engine is
not running. If the light does not come on, have it
repaired. This light will also come on during a
malfunction in one of two ways:
•
Light Flashing — A misfire condition has been
detected. A misfire increases vehicle emissions
and may damage the emission control system on
your vehicle. Diagnosis and service may be
required.
•
Light On Steady — An emission control system
malfunction has been detected on your vehicle.
Diagnosis and service may be required.
3-49
Summary of Contents for Silverado 2003
Page 5: ...These are some examples of vehicle symbols you may find on your vehicle v ...
Page 18: ...Put someone on it Get it up to speed Then stop the vehicle The rider doesn t stop 1 12 ...
Page 78: ...United States without Passenger Sensing System Canada with Passenger Sensing System 1 72 ...
Page 156: ... NOTES 2 68 ...
Page 159: ... NOTES 3 3 ...
Page 160: ...Instrument Panel Overview 3 4 ...
Page 194: ...Canada with Passenger Sensing System Canada without Passenger Sensing System 3 38 ...
Page 282: ... NOTES 3 126 ...
Page 380: ... NOTES 4 98 ...
Page 394: ...When you lift up the hood on the VORTEC 8100 V8 engine you will see the following 5 14 ...
Page 461: ...Removing the Spare Tire and Tools Regular Cab and Crew Cab Extended Cab 5 81 ...
Page 494: ...5 114 ...
Page 525: ...Maintenance Record cont d Date Odometer Reading Serviced By Maintenance Record 6 23 ...
Page 526: ...Maintenance Record cont d Date Odometer Reading Serviced By Maintenance Record 6 24 ...
Page 556: ... NOTES 20 ...