Section 1027 (Engine Controls - 6.6L (LLY) (Troubleshooting & Diagnosis))
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Troubleshooting
- Symptoms - Engine Controls
- Intermittent Conditions
- Hard Start
- Surges/Chuggles
- Lack of Power, Sluggishness, or Sponginess
- Fuel Knock/Combustion Noise
- Hesitation, Sag, Stumble
- Cuts Out, Misses
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle and Stalling
- Excessive Smoke (White)
- Excessive Smoke (Black)
- Excessive Smoke (Gray or Blue)
- Malfunction Indicator Lamp (MIL) Inoperative
- Malfunction Indicator Lamp (MIL) Always On
- Engine Cranks but Does Not Run
- Ignition Relay Diagnosis
- Fuel Pressure Regulator Diagnosis
- Fuel System Diagnosis
- Fuel Return System Diagnosis
- Fuel Leaks
- Fuel System Diagnosis - High Pressure Side
- Fuel Injector Balance Test with Tech 2 (with Automatic Transmission)
- Fuel Injector Balance Test with Tech 2 (with Manual Transmission)
- Fuel Tank Leak Test
- Contaminants-in-Fuel Diagnosis
- Inspection/Maintenance (I/M) System Check
- Inspection/Maintenance (I/M) System DTC Table
- Inspection/Maintenance (I/M) Complete System Set Procedure
- Inspection/Maintenance (I/M) Exhaust Gas Recirculation (EGR) System Set Procedure
- Inspection/Maintenance (I/M) Misfire Monitoring System Set Procedure
- Fuel Heater Inoperative
- Fuel Heater Always On