LB7 Duramax Symptoms

Common LB7 Duramax symptoms, what usually causes them, and how to narrow them down.

• Engine Stalls or Dies While Driving — LB7 Duramax A concise diagnostic reference for LB7 Duramax (2001–2004) stalling or dying while driving, focused on fuel rail pressure loss and crank/cam signal loss.
• Fuel in the Oil or Rising Oil Level — LB7 Duramax A diagnostic reference for LB7 Duramax (2001–2004) when the engine oil level rises, the oil smells of diesel, or owners report fuel contamination of the…
• Hard Start or Long Crank — LB7 Duramax A concise diagnostic reference for hard start or long crank on the 2001–2004 GM 6.6L LB7 Duramax.
• Loss of Power Under Load — LB7 Duramax Diagnostic reference for LB7 Duramax (2001–2004) loss of power under load, including related trouble codes P1093, P0087, P0299, P0234, P0237, P0238.
• Reduced Power or Poor Throttle Response — LB7 Duramax Diagnostic reference for LB7 Duramax (2001–2004) reduced power or poor throttle response. Covers accelerator pedal position system faults and related…
• Rough Idle, Misfire or Smoke — LB7 Duramax Diagnostic reference for rough idle, misfire and smoke on 2001–2004 GM Silverado/Sierra 2500HD/3500 6.6L LB7 Duramax. Covers injector-related causes and how to…