Section 1469 (Engine Control System - 4.8L, 5.3L, & 6.0L - Troubleshooting & Diagnosis)
WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Information & Procedures
- Symptoms - Engine Controls
- Intermittent Conditions
- Hard Start
- Surges/Chuggles
- Lack of Power, Sluggishness, or Sponginess
- Detonation/Spark Knock
- Hesitation, Sag, Stumble
- Cuts Out, Misses
- Poor Fuel Economy
- Poor Fuel Fill Quality
- Rough, Unstable, or Incorrect Idle and Stalling
- Dieseling, Run-On
- Backfire
- Malfunction Indicator Lamp (MIL) Inoperative
- Malfunction Indicator Lamp (MIL) Always On
- Engine Cranks but Does Not Run
- Ignition Relay Diagnosis
- Fuel Pump Electrical Circuit Diagnosis
- Fuel System Diagnosis (With Returnless Fuel System)
- Fuel System Diagnosis (Without Returnless Fuel System)
- Fuel Injector Coil Test
- Fuel Injector Balance Test with Special Tool
- Fuel Injector Balance Test with Tech 2
- Fuel Tank Leak Test
- Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool and E85)
- Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool)
- Electronic Ignition (EI) System Diagnosis
- Inspection/Maintenance (I/M) System Check
- Inspection/Maintenance (I/M) Complete System Set Procedure
- Inspection/Maintenance (I/M) System DTC Table
- Inspection/Maintenance (I/M) Catalyst System Set Procedure (Without HP2)
- Inspection/Maintenance (I/M) Evaporative Emission (EVAP) System Set Procedure
- Inspection/Maintenance (I/M) Heated Oxygen Sensor/Oxygen Sensor (HO2S/O2S) System Set Procedure
- Inspection/Maintenance (I/M) Heated Oxygen Sensor (HO2S) Heater System Set Procedure