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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Control System & Fuel System - 6.6L (LLY) - Troubleshooting & Diagnosis) >> Inspection/Maintenance (I/M) System Check >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: Any DTCs set, even those not listed in the I/M system DTC table, may prevent the required DTCs from running.
  1. Repair any DTCs or driveability concerns.
  2. Review any service bulletins for software updates that may prevent the required DTCs from running.
  3. Perform any reprogramming or repairs indicated by the service bulletins.
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