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2003 Chevrolet Trailblazer LT EXT
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I think you are going to need a code reader to assist with your solution.

-did the CEL come on before the engine died?

you could have any number of things going on.

-wish more help could be offered, sorry
 

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2003 Chevrolet Trailblazer LT EXT
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I would go back and check all the electronic fittings of all the things you touched in your recent service
-check the connector on the camshaft solenoid...making good connection? none of the pins bent?

I am never convinced that a fuel filter would cause that kind of issue so fast.
The fuel today is really good quality.
 

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2003 Chevrolet Trailblazer LT EXT
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if it was wet it might cause a concern.

I would suspect the items that were recently touched or removed and then reinstalled first.
I hear you when you say it was 2 weeks ago, but if it ran fine before....and it's not running now I would suspect the easy things first
 

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I searched "no start" and there seems to be a number of threads that indicate a bad ignition switch can cause your issue.
 
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