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 MANUALSCHEVROLET2010CHEVY EXPRESS H1500, VAN CARGOREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS AND FUEL - 4.8L, 5.3L, 6.0L, 6.2L, OR 7.0L - TROUBLESHOOTING AND DIAGNOSISENGINE CRANKS BUT DOES NOT RUNCIRCUIT/SYSTEM VERIFICATION
2010 Chevrolet Chevy Express H1500, Van Cargo
Circuit/System Verification
2010 Chevrolet Chevy Express H1500, Van CargoSECTION Circuit/System Verification
- Engine cranking for 15 seconds, observe the DTC information with a scan tool. Verify that DTC P0117, P0118, P0122, P0123, P0201-P0208, P0222, P0223, P0300-P0308, P0335, P0336, P0351-P0358, P0562, P0563, P0601-P0604, P0606, P0607, P062F, P0633, P0685, P0690, P1631, P1682, or P2610 is not set.
- If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Ignition ON, view the security indicator. The security indicator should not remain illuminated after the vehicle bulb check has completed.
- If the security indicator remains illuminated after the bulb check, refer to Diagnostic Trouble Code (DTC) List - Vehicle , and diagnose any theft deterrent DTCs set as current.
- Engine cranking, observe the scan tool Engine Speed parameter. The scan tool should indicate an engine speed greater than 0 RPM.
- Verify the following scan tool parameters indicate OK when the engine is cranked:
- Cylinder 1-8 Injector Circuit Short to Ground Test Status
- Cylinder 1-8 Injector Circuit Open Test Status
- If the parameters do not indicate the specified values, refer to DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 .
- Verify the Cylinder 1-8 Injector Circuit Short to Volts Test Status scan tool parameter changes from NOT RUN to OK when the engine is cranked.
- If the parameter does not indicate the specified values, refer to DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 .
- Ignition ON, command the fuel pump ON with a scan tool. You should hear the fuel pump turn ON.
- If the fuel pump does not turn ON, refer to Fuel System Diagnosis (w/o FPCM) or Fuel System Diagnosis (w/FPCM) .
- Ignition OFF, install the CH-48027 . Refer to Fuel Pressure Gauge Installation and Removal .
- The fuel pump may need to be commanded ON several times in order to obtain the highest possible fuel pressure.
- Do NOT start the engine for this test.
- Ignition ON, command the fuel pump ON with a scan tool. The fuel pressure should be between 345-414 kPa (50-60 psi).
- If not within the specified range, refer to Fuel System Diagnosis (w/o FPCM) or Fuel System Diagnosis (w/FPCM) .
- Verify the following conditions do not exist:
- Collapsed air intake duct to the throttle body
- Restricted air filter element
- Spark plugs for being fouled
- A skewed manifold absolute pressure (MAP) sensor - Refer to DTC P0106 .
- A skewed engine coolant temperature (ECT) sensor - Refer to DTC P0116 .
- Exhaust system restricted - Refer to Restricted Exhaust .
- Fuel contamination - Refer to Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool) or Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) .
- Engine mechanical condition - Refer to Symptoms - Engine Mechanical or Engine Compression Test .
NOTE:
Additional DTCs may set when using the fuel pump output control.
NOTE:
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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.