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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 569 (ENGINE CONTROLS (TROUBLESHOOTING & DIAGNOSIS) -- 5.7L)TROUBLESHOOTINGINSPECTION/MAINTENANCE (I/M) AIR SYSTEM SET PROCEDURECONDITIONS FOR RUNNING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Conditions for Running

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Conditions for Running
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  • The engine coolant temperature (ECT) is between -10 to +110°C (14-230°F).
  • The intake air temperature (IAT) is between -10 to +100°C (14-212°F).
  • The battery voltage is more than 11.7 volts.
  • The start-up ECT is less than 70°C (158°F).
  • The engine is running for more than 30 seconds.
  • The mass air flow (MAF) is less than 22 g/s.
  • The air fuel ratio is 14.7:1.
  • The engine load is less than 40 percent.
  • The vehicle speed is more than 25 km/h (15 mph).
  • The engine is operating in Closed Loop for more than 15 seconds.
  • The engine speed is more than 850 RPM.
  • The fuel system is operating in fuel trim cells 1, 2, 4, or 5.
  • The short term FT is between -4 and +4 percent.
  • The engine is not operating in any of the following modes:
    • Power Enrichment mode
    • Decel Fuel Cut-off mode
    • Catalyst Over Temperature mode
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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.