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Old 04-18-2005, 06:55 PM
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2000 Silverado 5.3 Check Engine Light

I am baffled on this one. I have a 2000 Silverado with 80K miles and the 5.3L. If I run a bottle of dry gas per gas tank or every other, my check engine light won't come on. If I don't run dry gas, then I get a check engine light that scans as an evaporator system issue. All I can think of is that gas is getting into the canistor, and with the dry gas, the alcohol helps the gas to evaporate out. Any ideas would be greatly appreciated.

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Old 04-18-2005, 10:39 PM
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These are famous for this. Actually, the normal thing that causes this light is a plugged purge pump filter. GM has a kit to fix it, costs about $300 CAD. It is not a major concern, but the light is annoying.
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