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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) CATALYST 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.
  • DTCs P0420 and P0430 are not set.
  • The barometric pressure is more than 74 kPa.
  • The engine coolant temperature (ECT) is between 70-120°C (158-248°F).
  • The engine has been running for more than 10 minutes.
  • The engine is in Closed Loop fuel control.
  • The battery voltage is more than 10-18 volts.
  • The intake air temperature (IAT) is between -7° and +85°C (+20° and +185°F).
  • The difference between the engine speed and the desired engine speed is less than 200 RPM.
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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.