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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 14 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - DTC P0700 TO DTC P2463)DTC P2002CIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Verification
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Verify that DTCs P003A, P0047, P0048, P0101, P0201-P0208, P0234, P0299, P02A1, P02A5, P02AD, P02B1, P02B5, P02B9, P029D, P0300-P0308, P0401, P0402, P046C, P0545, P0546, P2032, or P2033 are not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify that leaks do not exist in the exhaust system. Refer to Exhaust Leakage .
- Engine running at idle, perform the following:
- Engine coolant temperature greater than 80°C (176°F).
- Command the EGR solenoid with a scan tool to 25 percent.
- Perform several accelerator pedal sweeps by rapidly depressing the accelerator pedal to wide open throttle (WOT) and returning the pedal to the at rest position, allowing the engine to return to idle speed for 5 seconds, while observing the exhaust from the tailpipe. There should be very light or no smoke visible from the tailpipe.
- If a heavy black smoke is observed from the vehicles tailpipe, replace the particulate filter assembly.
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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.