Question about 2004 Chevrolet TrailBlazer

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My check engine soon light is on. I have refilled with gas and redone the gas cap. Anything else that I can do

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Have your codes checked. It could be anything. The check engine light goes on even if a sensor is acting up (not necessarily gone). If it continues to flash instead of burn steady, you will be fixing something. It also goes on in some cars when certain required maintenance has not been performed (ex. oil change). So get the codes checked - at an autozone or advanced auto. Some local mechanics can check them and dealerships but they'll charge you a fee. Up to $200 just for checking codes.

Posted on Oct 15, 2010

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Yes, but we need trouble codes to help you.

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 15, 2010

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