2007 GMC Sierra 1500 Logo
Posted on Jan 11, 2009
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Engine light stays on

2004 GMC Sierra 1500 the engine light is always on, sometimes flashes abut never goes away. the problem started when the temperature reached -31. occsionally idles rough as well.

  • jarrah_elhal Jan 12, 2009

    is there a sensor that may have failed that will account for that? the oxygen sensor? could that be the problem?

  • jarrah_elhal Jan 12, 2009

    how much does a code reader cost?

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  • Posted on Jan 11, 2009
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Well very good possiblity it needs a tune up . Take it some where and have them check the codes on it and go from there

  • Anonymous Jan 12, 2009

    Well it could be just about anything there are many things that can turn the light on

  • Anonymous Jan 12, 2009

    well you can probly get 1 for under $100. or take it some place like auto zone or some of the parts houses will read the codes for you

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  • Posted on Mar 31, 2012
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I have a 2004 gmc Sierra 1500 ext can long box and the engine light is always on. I have taken it in to a few places and even had my brother check it out. I also have a code reader. I have never had a problem with it. When we hook up the code reader it says gas cap so we fix that and the light turns off till the next time I drive it. Have it checked out but it's probably nothing as I have come to realize its probably a dirty sensor somewhere.

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