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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1890 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - TROUBLESHOOTING AND DIAGNOSIS)FUEL INJECTOR BALANCE TEST WITH TECH 2CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Circuit/System Verification
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Circuit/System Verification
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
If any DTCs other than DTC P0300-P0308 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle
.
- Start and run the engine until the coolant temperature is more than 82°C (180°F). Turn OFF all accessories.
- Perform the fuel pressure regulator test, refer to Fuel Pressure Regulator Diagnosis .
- With a scan tool, command the Balance Rate Monitor ON. Balance rates should be between +4 mm3 and -6.9 mm3 in Park or Neutral. Balance rates outside the range may indicate contaminated fuel. Refer to Contaminants-in-Fuel Diagnosis .
- The Cylinder Power Balance Test must be performed under the conditions for which the customer concern occurred.
- Do not operate the cruise control during this test. Cruise control may cause a brief surge of engine speed after the completion of the test.
- Perform the Cylinder Power Balance Test with a scan tool. During cylinder cancellation a noticeable power difference will feel like a misfiring cylinder or vibration.
IMPORTANT:
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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.