Question about 2005 Chevrolet TrailBlazer

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Engine light going on and off???????

Just bought a certified pre owned 05 chevy trailblazer about 2 months ago. Recently the engine light will come on for like 2 days and then it will go off for a week. It is running fine with no apparent problem. Has anyone been having any similar problems????

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  • Meinbeast Nov 10, 2008

    thanks a lot reneckrich that was very helpful. Going to take it to the dealer and get it fixed hopefully, and ill let you know what the problem is as well.

  • hispeed3 Feb 08, 2009

    I have the same problem, changing the gas cap helped for a couple of weeks then it started again.

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  • 21 Answers

Does the problem come and go when you fill up? if so it is a evaporative emissions problem (air leak in the fuel vacuums system) if not, than i would probably say it was a fan clutch problem, trailblazers were bad about them going out, they are electric, not like they are electric cooling fans but they have wires running to it and the computer activates the fan clutch for the radiator fan. however if your vehicle was certified at a GM dealer, you have a 12 month warranty , even if the factory warranty is up on it, that is one of the perks of buying certified, that your dealer may not have told you about, i used to be a GM mechanic so i know how it worked. plus if you go in and make a big deal about how you just bought it and so on dealers are able to cover items like this under an extender warranty called GM goodfaith warranty which is available bumper to bumper up to 64,000 miles but its up to the service manager to allow it, so if you go in and make a big deal about it they will act like they are doing you a big favor by fixing it no charge, but it is an extra perk GM offers.

Posted on Nov 10, 2008

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