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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.
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Summary of Contents for 2004 Avalanche
Page 5: ...These are some examples of symbols that may be found on the vehicle v ...
Page 6: ... NOTES vi ...
Page 17: ...Put someone on it Get it up to speed Then stop the vehicle The rider doesn t stop 1 11 ...
Page 169: ... NOTES 3 3 ...
Page 170: ...Instrument Panel Overview 3 4 ...
Page 200: ...Instrument Panel Cluster United States 2500 series shown 1500 series and Canada similar 3 34 ...
Page 284: ... NOTES 3 118 ...
Page 380: ...When you open the hood on the VORTEC 8100 V8 engine you will see the following 5 14 ...
Page 490: ...5 124 ...
Page 496: ... NOTES 5 130 ...
Page 512: ...Engine Drive Belt Routing A Air Conditioning Compressor 6 16 ...