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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Controls - 5.7L - Troubleshooting & Diagnosis) >> Troubleshooting >> Fuel Pump Electrical Circuit Diagnosis >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

Listen for an audible hiss from the fuel pump when the fuel pump relay is commanded ON. A vibration in the fuel feed line when the fuel pump relay is commanded ON indicates that the fuel pump is operating.

For an intermittent condition, refer to Intermittent Conditions .

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