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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1894 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L LMM - DTC P0016 TO DTC P02E0)DTC P0230CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Turn OFF the ignition.
- Remove the fuel pump relay and turn ON the ignition, with the engine OFF.
- Probe the control circuit of the fuel pump relay with a test lamp that is connected to a good ground.
- Command the fuel pump ON and OFF with a scan tool.
- If the test lamp remains illuminated, test the fuel pump relay control circuit for a short to voltage or a faulty ECM.
- If the test lamp does not turn ON and OFF with each command, test the fuel pump relay control circuit for a short to ground or an open. If the circuit tests normal replace the control module.
- Connect a test lamp between the control circuit of the fuel pump relay and the ground circuit of the relay.
- Command the fuel pump ON and OFF with a scan tool.
- If the test lamp does not turn ON and OFF with each command, test the fuel pump relay ground circuit for an open or high resistance.
- If the test lamp turns ON and OFF with each command, replace the fuel pump relay.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.