Repair and Diagnosis

You are viewing the "split tree" of links. The tree is cut off at a certain depth to keep the page loading fast, but you may have to click multiple links to get to the content you want.
View "full tree" with all links on one page (will load slowly, but easier to use ctrl-f to search all pages)

Expand All (for easy ctrl-f) Collapse All

• Quick Lookups
  • Common Specs & Procedures
  • DTC Index
  • Electrical Component Locations
    • Diagnostic Connector (DLC) Locations
    • Electrical Component Locator
    • Wiring Systems (Component Locator)
  • Fluids
  • Technical Bulletins
    • Campaigns
    • Safety Recalls
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • OEM Connector End Views - Connector Index
    • OEM Connector End Views (1 Of 5)
    • OEM Connector End Views (2 Of 5)
    • OEM Connector End Views (3 Of 5)
    • OEM Connector End Views (4 Of 5)
    • OEM Connector End Views (5 Of 5)
    • System Wiring Diagrams - 2500 Hd
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Systems - Introduction
    • Wiring Systems - Connector End Views
• Accessories & Equipment
  • Accessories Control Systems
    • Garage Door Opener System
  • Anti-Theft Systems
    • Door System, Mirror System & Window System
    • Keyless Entry System
    • Theft Deterrent System
  • Communication Devices
    • Body Control System
    • Data Link Communication System
    • Service Programming System
  • Cruise Control Systems
  • Entertainment Systems
    • Cellular Communication System
    • Entertainment System
  • Exterior Lights
    • Lighting Systems
  • Gauges & Instrument Panels
    • Instrument Panel System Displays, Gauges And Console
  • Headlights
    • Lighting Systems
  • Heated Glass/Defoggers
    • Stationary Window System
  • Horns
    • Horn System
  • Ignition Switch/Steering Lock
    • Steering Wheel And Steering Column
  • Infotainment
    • Cellular Communication System
    • Entertainment System
  • Interior/Exterior Trim
    • Door System, Mirror System & Window System
    • Exterior Trim
    • Instrument Panel System Displays, Gauges And Console
    • Interior Trim
  • Interior/Illumination Lights
    • Lighting Systems
  • Memory Modules
    • Personalization Systems
  • Mirrors
    • Door System, Mirror System & Window System
    • Stationary Window System
  • Seats
    • Seat System
  • Steering Column Switches
    • Steering Wheel And Steering Column
  • Window Motors & Regulators
    • Door System, Mirror System & Window System
    • Stationary Window System
  • Wiper/Washer Systems
    • Wiper System & Washer System
• Body & Frame
  • Door Locks
    • Door System, Mirror System & Window System
    • Keyless Entry System
    • Theft Deterrent System
  • Exterior Body Panels
    • Air/Wind Noise Symptoms
    • Body Front End
    • Body Rear End
    • Bumper System
    • Squeaks And Rattles
    • Water Leaks
  • Exterior/Interior Trim
    • Door System, Mirror System & Window System
    • Exterior Trim
    • Instrument Panel System Displays, Gauges And Console
    • Interior Trim
  • Frames, Subframes & Crossmembers
    • Frame & Underbody
  • Ignition Switch/Steering Lock
    • Steering Wheel And Steering Column
  • Mirrors
    • Door System, Mirror System & Window System
    • Stationary Window System
  • Seats
    • Seat System
  • Windows
    • Door System, Mirror System & Window System
    • Stationary Window System
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System And Traction Control System
  • Mechanical - Hydraulic
    • Disc Brake System
    • Hydraulic Brake System
  • Parking Brake System
  • Antilock Brake System And Traction Control System
• Drivelines & Axles
  • Axle Shafts
    • Wheel Drive Shafts
  • Differentials & Drive Axles
    • Drive Axle - Locking/Limited Slip
    • Front Drive Axle
    • Rear Drive Axle
  • Driveshaft & Universal Joints
    • Propeller Shaft And Universal Joints
• Electrical
  • Body Electrical
    • OEM Connector End Views - Connector Index
    • OEM Connector End Views (1 Of 5)
    • OEM Connector End Views (2 Of 5)
    • OEM Connector End Views (3 Of 5)
    • OEM Connector End Views (4 Of 5)
    • OEM Connector End Views (5 Of 5)
    • Power Outlets
    • Retained Accessory Power System
    • Wiring Systems - Introduction
    • Wiring Systems - Connector End Views
    • Wiring Systems (Component Locator)
  • Charging Systems
    • Battery, Charging System & Starting System
    • Battery, Charging System And Starting System Diagnosis - Diagnostic Information And Procedures
    • Battery, Charging System And Starting System Diagnosis (DTC B1327-DTC P1638)
    • Battery, Charging System And Starting System Diagnosis (DTC P1A00-DTC P1AC9)
    • Battery, Charging System And Starting System Diagnosis (Troubleshooting)
  • Component Locations
    • Diagnostic Connector (DLC) Locations
    • Electrical Component Locator
    • Wiring Systems (Component Locator)
  • Fuses & Circuit Breakers
  • Instrument Panel System Displays, Gauges And Console
  • Horns
    • Horn System
  • Motors, Switches, Relays
    • OEM Connector End Views - Connector Index
    • OEM Connector End Views (1 Of 5)
    • OEM Connector End Views (2 Of 5)
    • OEM Connector End Views (3 Of 5)
    • OEM Connector End Views (4 Of 5)
    • OEM Connector End Views (5 Of 5)
    • Power Outlets
    • Retained Accessory Power System
    • Wiring Systems - Introduction
    • Wiring Systems - Connector End Views
    • Wiring Systems (Component Locator)
  • Starter
    • Battery, Charging System & Starting System
    • Battery, Charging System And Starting System Diagnosis - Diagnostic Information And Procedures
    • Battery, Charging System And Starting System Diagnosis (DTC B1327-DTC P1638)
    • Battery, Charging System And Starting System Diagnosis (DTC P1A00-DTC P1AC9)
    • Battery, Charging System And Starting System Diagnosis (Troubleshooting)
  • Wiring Diagrams
    • OEM Connector End Views - Connector Index
    • OEM Connector End Views (1 Of 5)
    • OEM Connector End Views (2 Of 5)
    • OEM Connector End Views (3 Of 5)
    • OEM Connector End Views (4 Of 5)
    • OEM Connector End Views (5 Of 5)
    • System Wiring Diagrams - 2500 Hd
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Systems - Introduction
    • Wiring Systems - Connector End Views
• Engine Mechanical
  • Accessory Drive Belts
    • Cooling System Specifications & Drive Belt Routing
  • Auxiliary Emission Control Systems
    • Emission Control Visual Inspection Procedures - Diesel
  • Cooling System (Mechanical)
    • Cooling System Specifications & Drive Belt Routing
    • Engine Cooling System
    • Engine Cooling System - Alternative Fuels (Supplement)
  • Engine Exhaust System
  • Lubrication System
    • Maintenance And Lubrication - Alternative Fuels
  • Mechanical
    • Engine Mechanical - 6.6L (Lb7) (Introduction)
    • Engine Mechanical - 6.6L (Lb7) (Repair Instructions 1 Of 4)
    • Engine Mechanical - 6.6L (Lb7) (Repair Instructions 2 Of 4)
    • Engine Mechanical - 6.6L (Lb7) (Repair Instructions 3 Of 4)
    • Engine Mechanical - 6.6L (Lb7) (Repair Instructions 4 Of 4)
  • Power Takeoff
    • Power Take-Off System
  • Starter
    • Battery, Charging System & Starting System
    • Battery, Charging System And Starting System Diagnosis - Diagnostic Information And Procedures
    • Battery, Charging System And Starting System Diagnosis (DTC B1327-DTC P1638)
    • Battery, Charging System And Starting System Diagnosis (DTC P1A00-DTC P1AC9)
    • Battery, Charging System And Starting System Diagnosis (Troubleshooting)
• Engine Performance
  • Emissions
    • EGR Function Testing - Diesel General Motors
    • Emission Applications - Diesel
    • Emission Applications - Except Diesel
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Mode 6 - Class 2 & GMLAN
  • Specifications
    • Firing Order & Cylinder Identification
  • System
    • Engine Controls - 6.6L (Lb7) (Diagnostic Information & Procedures)
    • Engine Controls - 6.6L (Lb7) (Introduction)
    • Engine Controls - 6.6L (Lb7) (Troubleshooting & Diagnosis
    • Engine Controls - Strategy Based Engine Diagnosis
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0016 To P0236)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0237 To P0611)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0612 To P2141)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P2142 To P2279)
  • Testing & Diagnosis
    • Engine Controls - 6.6L (Lb7) (Diagnostic Information & Procedures)
    • Engine Controls - 6.6L (Lb7) (Introduction)
    • Engine Controls - 6.6L (Lb7) (Troubleshooting & Diagnosis
    • Engine Controls - Strategy Based Engine Diagnosis
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0016 To P0236)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0237 To P0611)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P0612 To P2141)
    • Engine Controls Diagnosis - 6.6L (Lb7) (DTCS P2142 To P2279)
• General Information
  • Abbreviations
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
  • Basic Trouble Shooting
    • Basic Trouble Shooting - General Information
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
    • Engine Performance - Trouble Shooting - General Information
  • Brakes
    • Anti-Lock Brake Safety Precautions - General Information
    • Map - Brake Systems
    • Map - Routine Inspection Reference Guide
  • Check Lists
    • Symptom Check List Worksheet - General Information
  • OBD-II Drive Cycles - 6.6L (Lb7) Diesel
  • Driveline/Axles
    • Drive Axle Noise Diagnosis - General Information
    • Gear Tooth Contact Patterns - General Information
    • Map - Drive Train & Transmission
    • Trouble Shooting - Clutches - General Information
  • DTC Index
  • Electrical
    • Map - Electrical Systems
    • Using lemon2025'S System Wiring Diagrams
  • Engine
    • Engine Overhaul Procedures - General Information
    • General Cooling System Service - General Information
  • Engine Performance
    • Electrostatic Discharge Warning - General Information
    • Engine Performance Diagnostic Routine Outline - General Information
    • Engine Performance Safety Precautions
    • Map - Engine Performance & Maintenance
    • Parasitic Load Explanation & Test Procedures - General Information
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
    • Waveforms - Injector Pattern Tutorial - General Information
  • Map - Exhaust Systems
  • Heating, Ventilation & A/C (HVAC)
    • Map - Heating, Ventilation, & Air Conditioning
  • Hoist/Jack
    • General Information
  • Identification
    • CANADIAN Model Cross-Reference
    • General Information
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • OEM General Information
    • Automatic Stop/Start Disable
    • Engine Controls - Strategy Based Engine Diagnosis
    • General Information
    • Gm Vehicles Cautions & Notices
    • Preface, Cautions And Notices
    • Vehicle DTC Information
    • Vibration Symptoms Diagnosis And Correction
  • Reset Procedures
    • BARTEC TPMS Reset Procedure
    • Maintenance And Lubrication - Alternative Fuels
    • Maintenance Reminder Light (Reset Procedures)
  • Restraints
    • Supplemental Inflatable Restraint System - Deactivation Procedures
    • Supplemental Inflatable Restraint System Component Inspection & Replacement Tables.
  • RPO Codes
    • General Information
  • Specifications Index
    • Common Specs & Procedures
  • Steering
    • Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
    • Wheel Alignment Theory & Operation - General Information
  • Traction Control Disable Procedures
  • Trouble Shooting - Manual Transmission - General Information
• Heating, Ventilation & A/C (HVAC)
  • General Servicing
    • Cabin Air Filter (Special Applications) - General Information
  • HVAC Control Systems
    • Heating, Ventilation And Air Conditioning - Alternative Fuel
    • HVAC Systems - Automatic
    • HVAC Systems - Manual
• Maintenance
  • Procedures
    • Maintenance And Lubrication - Alternative Fuels
• Restraints
  • Air Bag, SRS
    • Supplemental Inflatable Restraint System
  • Restraints Control Systems
    • Seat Belt System
  • Seat Belts
    • Seat Belt System
• Steering
  • Electronic Steering
    • Rear Wheel Steering System
  • Manual Steering
    • Power Steering System
  • Power Steering System
  • Steering Wheel And Steering Column
  • Steering Linkage (Non-Rack & Pinion)
• Suspension
  • Electronic Suspension
    • Suspension Control System - Suspension Damping
  • Front Suspension
    • Front Suspension System
    • Suspension System General Diagnosis
  • Rear Suspension
    • Rear Suspension System
    • Suspension System General Diagnosis
  • Wheel Alignment
    • Wheel Alignment Specifications
    • Wheel Alignment Specifications & Adjustment Procedures
  • Wheels & Tire System
    • Tires And Wheels
• Transmission
  • Automatic Trans
    • Automatic Transmission - ALLISON (Diagnostic Information And Procedures)
    • Automatic Transmission - ALLISON (Introduction, Service & Replacement)
    • Automatic Transmission - ALLISON (Troubleshooting)
    • Automatic Transmission - ALLISON, Diagnosis (DTC P0218 To DTC P0735)
    • Automatic Transmission - ALLISON, Diagnosis (DTC P0736 To DTC P0872)
    • Automatic Transmission - ALLISON, Diagnosis (DTC P0873 To DTC P2810)
    • Automatic Transmission - ALLISON - Overhaul
    • Automatic Transmission Servicing - ALLISON LCT 1000
    • Shift Lock Control System
  • Hydraulic Diagrams
    • Automatic Transmission - ALLISON - Overhaul
• External Pages