Question about 2004 Chevrolet Silverado 1500 Crew Cab

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2004z71 engine light on and has a rough idle

Any thoughts on my check engile light on and the rough idle

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U need to have the engine trouble codes read. Most parts stores provide this service for free. They can recommend what should be done to fix the problem after they scan for codes. Any further info needed, u can post any ? here.

Posted on Dec 30, 2008

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Posted on Jan 02, 2017

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I am not sure if everything is related, but here are a few suggestions:

Have an auto parts store download your code from the service engile light,and see what system it is pointing too. They usually will do this for free.

Your speedometer is driven off a speed sensor, in the top of the transmission.

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