Section 133 (Engine Controls Self-Diagnostics - 4.3L): Summary

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Summary
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

If no hard fault DTCs are present, driveability symptoms exist or intermittent DTC(s) exist, diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.). See SYMPTOMS in TROUBLE SHOOTING - NO CODES - 4.3L CHEVY EXPRESS & SAVANA article.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.