Question about 2003 Chevrolet TrailBlazer

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My service engine light on the dash has come on and stayed on. We took it in to have it hooked up to find out why the light is on. The guy told us there might be a fuse out some where because when he hooked up his machine my trailblazer wouldn't kick the machine on. Is this true and if it is where are the fuses?

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  • Chevrolet Master
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Just make sure your gas cap is on tight there is no fuse...i wish everything could be fixed with fuse..the gas cap is the number one trouble code for the light just drive it a couple of miles and see what happens.they have a rubber seal that once warn has air leak making light come on good luck

Posted on Jan 31, 2010

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  • Chevrolet Master
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No it is not,this means the e c m is not communicating with the scanner,and usually means the e c m is bad,that is why the light is on.

Posted on Jan 31, 2010

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