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To determine if the fuel pump in your 2003 Chevy Impala is bad, listen for a humming sound from the fuel tank when you turn the ignition key to the "on" position (without starting the engine). If you don't hear this sound, it may indicate a failing fuel pump. Additionally, if the engine cranks but doesn't start, or if you experience poor acceleration and stalling, these could also be signs of a faulty fuel pump. Testing fuel pressure with a gauge can provide definitive evidence of a malfunction.

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1w ago

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