Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2011CHEVY EXPRESS G3500, VAN CARGO, 6.0 BREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS AND FUEL - 4.8L, 5.3L, 6.0L - DTC P0420 TO DTC P2544 AND DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC INFORMATION AND PROCEDURESDTC P2534 (FUEL PUMP CONTROL MODULE)CIRCUIT/SYSTEM TESTING
2011 Chevrolet Chevy Express G3500, Van Cargo, 6.0 B
Circuit/System Testing
2011 Chevrolet Chevy Express G3500, Van Cargo, 6.0 BSECTION Circuit/System Testing
- Verify that DTC P0562 is not set.
- If DTC P0562 is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Ignition OFF, disconnect the harness connector of the fuel pump control module.
- Ignition ON, test for greater than 11 V between the IGN voltage circuit terminal 15 and ground.
- If less than the specified voltage, test the IGN voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the FCSM IGN fuse is open, test the voltage circuit for a short to ground. If the circuit tests normal, test or replace the Run/Crank relay.
- If all circuits test normal, replace the fuel pump control module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.