Question about 2004 GMC Envoy

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Engine light on, idleing rough all fluids topped up

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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 11, 2010

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Posted on Jan 02, 2017

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Check engine light flashing check engine soon smell of gas and not running smouth


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Generally The brake light only indicates the parking brake is on and/or low fluid in level. You are correct that it indicates a vacuum leak recheck ALL vacuum lines you should be able to hear it as well.

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