Chevrolet Silverado 2005 Specifications download pdf (Page 210)

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101

If the Light Is On Steady

You may be able to correct the emission system

malfunction by considering the following:

Did you recently put fuel into your vehicle?

If so, reinstall the fuel cap, making sure to fully install

the cap. See Filling Your Tank on page 5-10. The

diagnostic system can determine if the fuel cap has

been left off or improperly installed. A loose or missing

fuel cap will allow fuel to evaporate into the atmosphere.

A few driving trips with the cap properly installed

should turn the light off.

Did you just drive through a deep puddle of water?

If so, your electrical system may be wet. The condition

will usually be corrected when the electrical system

dries out. A few driving trips should turn the light off.

Have you recently changed brands of fuel?

If so, be sure to fuel your vehicle with quality fuel. See

Gasoline Octane on page 5-6. Poor fuel quality will

cause your engine not to run as efficiently as designed.

You may notice this as stalling after start-up, stalling

when you put the vehicle into gear, misﬁring, hesitation

on acceleration, or stumbling on acceleration. (These

conditions may go away once the engine is warmed up.)

This will be detected by the system and cause the

light to turn on.

If you experience one or more of these conditions,

change the fuel brand you use. It will require at least

one full tank of the proper fuel to turn the light off.

If none of the above steps have made the light turn off,

your dealer can check the vehicle. Your dealer has

the proper test equipment and diagnostic tools to ﬁx any

mechanical or electrical problems that may have

developed.

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.

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Chevrolet Silverado 2005 Specifications Page 210

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