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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 428 (ENGINE CONTROLS - 4.3L (TROUBLESHOOTING & DIAGNOSIS))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 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The barometric pressure is more than 74 kPa.
- Engine coolant is at operating temperature, 71-120° C (160-248° F).
- The intake air temperature (IAT) is between -15 to +75° C (5-167° F).
- The engine is in Closed Loop Fuel Control.
- The engine has run for 6-8 minutes off idle in order to initiate test.
- Battery voltage is between 11-18 volts.
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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.