How do I fix the humming noise from fuel pump/filter. on 2000 Chevrolet Silverado 2500

I replaced fuel pump and fuel filter and the humming noise remains. Sometimes it's very loud and other times it's quieter. Fuel level in tank and outside tempurature don't seem to affect noise level.

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2 answers
Fuel pump is on the way out.
Bad fuel pump need to replace it asap