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P1681 Chevrolet - 2003 trailblazer we replaced the engine it fires but is not getting fuel we are getting this code along with P1515

Vehicle: 2003 trailblazer

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p1515 is related to the throttle body, might want to clean the throttle body first.

p1681 is related to the PCM if you are not getting P0602 the PCM will need to be replaced according to the service manual.

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