Question about 2005 Chevrolet Silverado

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Engine Light/tighten fuel cap

About 2 months ago my engine light came on, went off, came on, went off and now stays on continually. I also get a message to "tighten fuel cap" and no one has messed with it for a few days. lighter ports are not working? Any ideas?

Thanks in advance

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  • raven15132 Sep 18, 2008

    Replaced the gas cap. Check engine light still on and I have gotten the "tighten fuel cap" the past two mornings.....


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Good Day,

Sounds like your fuel cap needs to be replaced, there is a rubber seal in there to which keeps fuel pressure up, when this seal goes bad you get a drop in pressure and your engine light will come on. Replace the cap with a new one. As far as your lighter ports that is probably due to a blown fuse and unrelated to the fuel cap issue.

Hope this helps

Posted on Sep 10, 2008

  • Patrick McGee
    Patrick McGee Sep 23, 2008

    Be sure to disconnect your negative battery terminal for a few minutes then reconnect, this will clear the codes and turn off the check engine light. If you do not do this the code stays in the eprom forever. Once codes are cleared by disconnecting battery you should be all set, however if light comes back on have a tech with and OBDII reader (autozone does this for free)retrive the code so you know exactly what is causing the fault.

    Good Luck


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