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 G3500, VAN CARGO, 4.8 VREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (ENGINE CONTROL SYSTEM - 6.6L (LLY) - DTC P0016 TO DTC P0342)DTC P0102 OR P0103CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 V
Circuit/System Verification
2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 VSECTION Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Verify the integrity of the air induction system by inspecting for the following conditions:
- Damaged components
- Loose or improper installation
- Restrictions in the MAF air induction system
- Water intrusion
- A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 30-37 g/s at idle to 400 g/s or more at the time of the 2-3 shift.
- Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
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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.