Turns over but will not start, reduced engine power kight on on 2002 Chevrolet Trailblazer

ran fine all day, went to start again and reduced engine power light on and will not start

Asked by for the 2002 Chevrolet Trailblazer
It sounds like you have an electronic control system problem. But there isn't much I can do from here, I'd have to see your car to tell you more. Get it checked by a Chevy specialist.
Here's a directory link for you:
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how do i fix the problem