Question about 2007 Chevrolet TrailBlazer SS
Iwould guess the you have some kind of a with the fuel system presserization system or EVAP .The fuel system runs 8 differant self tests every time you start the vehicle if 1 fails it will set the MIL light off . But then go out in a few starts . If the vehicle is running OK then the next time it happens take it to your local auto parts store they will read the code at no charge . If its code P0440 or P0441 and so on . Then it has to do with this system and it could be something as a bad seal at the gas cap witch is not uncommon . But the problem will not hurt the engine and it also has to due with how much fuel is in the tank at the time .If the tank is less then 15 % or 15 % empty then the self test can be in error
Posted on Mar 22, 2011
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Posted on Jan 02, 2017
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