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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 897 (Engine Controls And Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Diagnosis & Troubleshooting) >> Fuel Pump Electrical Circuit Diagnosis (FPCM) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Repair all fuel system related DTCs before performing this diagnostic.
  1. Ignition ON, command the fuel pump relay ON and OFF several times using the scan tool output control function. You should hear or feel the fuel pump turn ON and OFF with each command.
    • If the fuel pump operates continuously, replace the fuel pump control module.
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