Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
  • DTC Index
  • Electrical Component Locations
    • Component Locations - Electrical Center Identification Views (1 Of 2)
    • Component Locations - Electrical Center Identification Views (2 Of 2)
    • Electrical Component Locator - Door Component Views (Coupe)
    • Electrical Component Locator - Door Component Views (Sedan)
    • Electrical Component Locator - Front Of Vehicle/Engine Compartment Component Views
    • Electrical Component Locator - Ground Views
    • Electrical Component Locator - Instrument Panel/Center Console Component Views
    • Electrical Component Locator - Luggage Compartment/Rear Of Vehicle Component Views
    • Electrical Component Locator - Master Electrical Component List
    • Electrical Component Locator - Passenger Compartment/Roof Component Views
    • Electrical Component Locator - Powertrain Component Views
    • Electrical Component Locator - Wheels/Vehicle Underbody Component Views
  • Fluids
  • Technical Bulletins
    • Campaigns
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B110)
    • Component Connector End Views (B111B-F107)
    • Component Connector End Views (F107-K20)
    • Component Connector End Views (K20-K83)
    • Component Connector End Views (K84-P29)
    • Component Connector End Views (P29-S78)
    • Component Connector End Views (S79D-X92RA)
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X100-X135)
    • Inline Harness Connector End Views (X150-X224)
    • Inline Harness Connector End Views (X225-X350)
    • Inline Harness Connector End Views (X402-X610)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Coupe)
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Sedan)
• Accessories & Equipment
  • Accessories Control Systems
    • Active Noise Cancellation
    • Power Outlets
  • Anti-Theft Systems
    • Immobilizer System
    • Remote Functions System
    • Theft Deterrent System
    • Vehicle Access System
  • Body Interior
    • Secondary And Configurable Customer Controls
    • Vehicle Access System
  • Collision/Avoidance
    • Driver Assistance Systems
    • Image Display Cameras
    • Parking Assistance Systems
    • Pedestrian Protection System
  • Communication Devices
    • Data Communications - Description And Operation
    • Data Communications - Diagnostic Information And Procedures
    • Data Communications - Fastener Specifications
    • Data Communications - Repair Instructions
    • Data Communications - Schematic Wiring Diagrams
    • Data Communications - Special Tools And Equipment
    • Programming And Setup
  • Cruise Control Systems
  • Drivers Assistance Systems - ADAS
    • Driver Assistance Systems
    • Image Display Cameras
    • Parking Assistance Systems
    • Pedestrian Protection System
  • Entertainment Systems
    • Active Noise Cancellation
    • Cellular, Entertainment, And Navigation
    • Image Display Cameras
  • Exterior Lights
    • Lighting System - Description And Operation
    • Lighting System - Diagnostic Information And Procedures (1 Of 2)
    • Lighting System - Diagnostic Information And Procedures (2 Of 2)
    • Lighting System - Fastener Specifications
    • Lighting System - Repair Instructions
    • Lighting System - Schematic Wiring Diagrams
  • Gauges & Instrument Panels
    • Displays And Gauges
    • Instrument Panel And Console Trim
  • Headlights
    • Lighting System - Description And Operation
    • Lighting System - Diagnostic Information And Procedures (1 Of 2)
    • Lighting System - Diagnostic Information And Procedures (2 Of 2)
    • Lighting System - Fastener Specifications
    • Lighting System - Repair Instructions
    • Lighting System - Schematic Wiring Diagrams
  • Heated Glass/Defoggers
    • Fixed And MOVEABLE Windows
  • Horns And Pedestrian Alerts System
  • Ignition Switch/Steering Lock
    • Immobilizer System
  • Infotainment
    • Active Noise Cancellation
    • Cellular, Entertainment, And Navigation
    • Image Display Cameras
  • Interior/Exterior Trim
    • Bolted Exterior Body Panels And Closures
    • Exterior Trim
    • Floor Coverings And HEADLININGS
    • Instrument Panel And Console Trim
    • Interior Trim
    • Seat Hardware, Trim, And Upholstery
  • Interior/Illumination Lights
    • Lighting System - Description And Operation
    • Lighting System - Diagnostic Information And Procedures (1 Of 2)
    • Lighting System - Diagnostic Information And Procedures (2 Of 2)
    • Lighting System - Fastener Specifications
    • Lighting System - Repair Instructions
    • Lighting System - Schematic Wiring Diagrams
  • Mirrors
  • Seats
    • Power Seats
    • Seat Hardware, Trim, And Upholstery
    • Seat Heating And Cooling System
  • Steering Column Switches
    • Secondary And Configurable Customer Controls
  • Warning Systems
    • Tire Pressure Monitoring System
  • Window Motors & Regulators
    • Fixed And MOVEABLE Windows
  • Wiper/Washer Systems
    • Wiper Systems And Washer Systems
• Body & Frame
  • Body, Cab Control Systems
    • Secondary And Configurable Customer Controls
    • Vehicle Access System
  • Door Locks
    • Immobilizer System
    • Remote Functions System
    • Theft Deterrent System
    • Vehicle Access System
  • Exterior Body Panels
    • Air/Wind Noise
    • Bolted Exterior Body Panels And Closures
    • Bumpers And Fascias
    • Squeaks And Rattles
    • Water Leaks
  • Exterior/Interior Trim
    • Bolted Exterior Body Panels And Closures
    • Exterior Trim
    • Floor Coverings And HEADLININGS
    • Instrument Panel And Console Trim
    • Interior Trim
    • Seat Hardware, Trim, And Upholstery
  • Frames, Subframes & Crossmembers
    • Frame And Underbody
  • Ignition Switch/Steering Lock
    • Immobilizer System
  • Mirrors
  • Seats
    • Power Seats
    • Seat Hardware, Trim, And Upholstery
    • Seat Heating And Cooling System
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Fixed And MOVEABLE Windows
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
  • Mechanical - Hydraulic
    • Disc Brakes
    • Hydraulic Brakes
  • Parking Brake System
  • Traction Control
    • Antilock Brake System
• Drivelines & Axles
  • Axle Shafts
    • Wheel Drive Shafts
  • Differentials & Drive Axles
    • Front Drive Axle
    • Rear Drive Axle
  • Driveshaft & Universal Joints
    • Propeller Shaft
• Electrical
  • Body Electrical
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B110)
    • Component Connector End Views (B111B-F107)
    • Component Connector End Views (F107-K20)
    • Component Connector End Views (K20-K83)
    • Component Connector End Views (K84-P29)
    • Component Connector End Views (P29-S78)
    • Component Connector End Views (S79D-X92RA)
    • Component Locations - Electrical Center Identification Views (1 Of 2)
    • Component Locations - Electrical Center Identification Views (2 Of 2)
    • Electrical Component Locator - Door Component Views (Coupe)
    • Electrical Component Locator - Door Component Views (Sedan)
    • Electrical Component Locator - Front Of Vehicle/Engine Compartment Component Views
    • Electrical Component Locator - Ground Views
    • Electrical Component Locator - Instrument Panel/Center Console Component Views
    • Electrical Component Locator - Luggage Compartment/Rear Of Vehicle Component Views
    • Electrical Component Locator - Master Electrical Component List
    • Electrical Component Locator - Passenger Compartment/Roof Component Views
    • Electrical Component Locator - Powertrain Component Views
    • Electrical Component Locator - Wheels/Vehicle Underbody Component Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X100-X135)
    • Inline Harness Connector End Views (X150-X224)
    • Inline Harness Connector End Views (X225-X350)
    • Inline Harness Connector End Views (X402-X610)
    • Wiring Systems And Power Management - Description And Operation
    • Wiring Systems And Power Management - Diagnostic Information And Procedures
    • Wiring Systems And Power Management - Electrical Schematic Symbols
    • Wiring Systems And Power Management - Fastener Specifications
    • Wiring Systems And Power Management - Ground Distribution Schematics
    • Wiring Systems And Power Management - How To Use Electrical Schematics
    • Wiring Systems And Power Management - Master Electrical Schematic Icons
    • Wiring Systems And Power Management - Power Distribution Schematics
    • Wiring Systems And Power Management - Power MODING Schematics
    • Wiring Systems And Power Management - Repair Instructions
    • Wiring Systems And Power Management - Schematics RPO Code List
    • Wiring Systems And Power Management - Special Tools And Equipment
    • Wiring Systems And Power Management - Trailer Connector/Provision Schematics
    • Wiring Systems And Power Management - Vehicle Zoning Strategy
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Coupe)
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Sedan)
  • Charging Systems
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures (1 Of 2)
    • 12 V Starting And Charging - Diagnostic Information And Procedures (2 Of 2)
    • 12 V Starting And Charging - Fastener Specifications
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment - Special Tools
  • Component Locations
    • Component Locations - Electrical Center Identification Views (1 Of 2)
    • Component Locations - Electrical Center Identification Views (2 Of 2)
    • Electrical Component Locator - Door Component Views (Coupe)
    • Electrical Component Locator - Door Component Views (Sedan)
    • Electrical Component Locator - Front Of Vehicle/Engine Compartment Component Views
    • Electrical Component Locator - Ground Views
    • Electrical Component Locator - Instrument Panel/Center Console Component Views
    • Electrical Component Locator - Luggage Compartment/Rear Of Vehicle Component Views
    • Electrical Component Locator - Master Electrical Component List
    • Electrical Component Locator - Passenger Compartment/Roof Component Views
    • Electrical Component Locator - Powertrain Component Views
    • Electrical Component Locator - Wheels/Vehicle Underbody Component Views
  • Fuses & Circuit Breakers
    • Component Locations - Electrical Center Identification Views (1 Of 2)
    • Component Locations - Electrical Center Identification Views (2 Of 2)
  • Gauges
    • Displays And Gauges
    • Instrument Panel And Console Trim
  • Horns And Pedestrian Alerts System
  • Motors, Switches, Relays
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B110)
    • Component Connector End Views (B111B-F107)
    • Component Connector End Views (F107-K20)
    • Component Connector End Views (K20-K83)
    • Component Connector End Views (K84-P29)
    • Component Connector End Views (P29-S78)
    • Component Connector End Views (S79D-X92RA)
    • Component Locations - Electrical Center Identification Views (1 Of 2)
    • Component Locations - Electrical Center Identification Views (2 Of 2)
    • Electrical Component Locator - Door Component Views (Coupe)
    • Electrical Component Locator - Door Component Views (Sedan)
    • Electrical Component Locator - Front Of Vehicle/Engine Compartment Component Views
    • Electrical Component Locator - Ground Views
    • Electrical Component Locator - Instrument Panel/Center Console Component Views
    • Electrical Component Locator - Luggage Compartment/Rear Of Vehicle Component Views
    • Electrical Component Locator - Master Electrical Component List
    • Electrical Component Locator - Passenger Compartment/Roof Component Views
    • Electrical Component Locator - Powertrain Component Views
    • Electrical Component Locator - Wheels/Vehicle Underbody Component Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X100-X135)
    • Inline Harness Connector End Views (X150-X224)
    • Inline Harness Connector End Views (X225-X350)
    • Inline Harness Connector End Views (X402-X610)
    • Wiring Systems And Power Management - Description And Operation
    • Wiring Systems And Power Management - Diagnostic Information And Procedures
    • Wiring Systems And Power Management - Electrical Schematic Symbols
    • Wiring Systems And Power Management - Fastener Specifications
    • Wiring Systems And Power Management - Ground Distribution Schematics
    • Wiring Systems And Power Management - How To Use Electrical Schematics
    • Wiring Systems And Power Management - Master Electrical Schematic Icons
    • Wiring Systems And Power Management - Power Distribution Schematics
    • Wiring Systems And Power Management - Power MODING Schematics
    • Wiring Systems And Power Management - Repair Instructions
    • Wiring Systems And Power Management - Schematics RPO Code List
    • Wiring Systems And Power Management - Special Tools And Equipment
    • Wiring Systems And Power Management - Trailer Connector/Provision Schematics
    • Wiring Systems And Power Management - Vehicle Zoning Strategy
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Coupe)
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Sedan)
  • Starter
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures (1 Of 2)
    • 12 V Starting And Charging - Diagnostic Information And Procedures (2 Of 2)
    • 12 V Starting And Charging - Fastener Specifications
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment - Special Tools
  • Wiring Diagrams
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B110)
    • Component Connector End Views (B111B-F107)
    • Component Connector End Views (F107-K20)
    • Component Connector End Views (K20-K83)
    • Component Connector End Views (K84-P29)
    • Component Connector End Views (P29-S78)
    • Component Connector End Views (S79D-X92RA)
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X100-X135)
    • Inline Harness Connector End Views (X150-X224)
    • Inline Harness Connector End Views (X225-X350)
    • Inline Harness Connector End Views (X402-X610)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Coupe)
    • Wiring Systems And Power Management - Wiring Harness Routing Views (Sedan)
• Engine Mechanical
  • Cooling System (Mechanical)
    • Engine Heating And Cooling System
  • Exhaust System
  • Lubrication System
    • Maintenance And Lubrication
  • Mechanical
    • Engine Mechanical - 2.0L (LTG) - Component Locator
    • Engine Mechanical - 2.0L (LTG) - Description And Operation
    • Engine Mechanical - 2.0L (LTG) - Diagnostic Information And Procedures
    • Engine Mechanical - 2.0L (LTG) - Repair Instructions - Off Vehicle
    • Engine Mechanical - 2.0L (LTG) - Repair Instructions - On Vehicle
    • Engine Mechanical - 2.0L (LTG) - Schematic Wiring Diagrams
    • Engine Mechanical - 2.0L (LTG) - Special Tools And Equipment
    • Engine Mechanical - 2.0L (LTG) - Specifications
  • Starter
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures (1 Of 2)
    • 12 V Starting And Charging - Diagnostic Information And Procedures (2 Of 2)
    • 12 V Starting And Charging - Fastener Specifications
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment - Special Tools
• Engine Performance
  • Emissions
    • Emission Applications
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Specifications
    • Firing Order & Cylinder Identification
  • System
    • Data Communications - Diagnostic Information And Procedures
    • Engine Controls And Fuel - 2.0L (LTG) - Description And Operation
    • Engine Controls And Fuel - 2.0L (LTG) - Diagnostic Information And Procedures (1 Of 2)
    • Engine Controls And Fuel - 2.0L (LTG) - Diagnostic Information And Procedures (2 Of 2)
    • Engine Controls And Fuel - 2.0L (LTG) - Repair Instructions
    • Engine Controls And Fuel - 2.0L (LTG) - Schematic Wiring Diagrams
    • Engine Controls And Fuel - 2.0L (LTG) - Special Tools And Equipment
    • Engine Controls And Fuel - 2.0L (LTG) - Specifications
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Description And Operation
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (1 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (2 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (3 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Repair Instructions
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Schematic Wiring Diagrams
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Special Tools And Equipment
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Specifications
  • Testing & Diagnosis
    • Data Communications - Diagnostic Information And Procedures
    • Engine Controls And Fuel - 2.0L (LTG) - Description And Operation
    • Engine Controls And Fuel - 2.0L (LTG) - Diagnostic Information And Procedures (1 Of 2)
    • Engine Controls And Fuel - 2.0L (LTG) - Diagnostic Information And Procedures (2 Of 2)
    • Engine Controls And Fuel - 2.0L (LTG) - Repair Instructions
    • Engine Controls And Fuel - 2.0L (LTG) - Schematic Wiring Diagrams
    • Engine Controls And Fuel - 2.0L (LTG) - Special Tools And Equipment
    • Engine Controls And Fuel - 2.0L (LTG) - Specifications
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Description And Operation
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (1 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (2 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Diagnostic Information And Procedures (3 Of 3)
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Repair Instructions
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Schematic Wiring Diagrams
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Special Tools And Equipment
    • Engine Controls And Fuel - 3.6L (LGX LF4) - Specifications
• 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
  • 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
    • Dangers, Warnings, And Cautions
    • General Information
    • Special Tools
    • Vehicle Diagnostic Information And Procedures
    • Vehicle Diagnostic Scan Tool Information (1 Of 2)
    • Vehicle Diagnostic Scan Tool Information (2 Of 2)
    • Vibration Diagnosis And Correction
  • Reset Procedures
    • Maintenance Reminder Light (Reset Procedures)
    • Programming And Setup
    • Tire Pressure Monitor Systems
  • 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)
  • HVAC Control Systems
    • Heating, Ventilation, And Air Conditioning System
    • HVAC - Automatic
• Maintenance
  • Procedures
    • Maintenance And Lubrication
• Restraints
  • Air Bag, SRS
    • Supplemental Restraints System
  • Restraints Control Systems
    • Seat Belts
  • Seat Belts
• Steering
  • Manual Steering
    • Power Steering System
  • Power Steering System
  • Steering Column
    • Steering Wheel And Column
  • Steering Control Systems
    • Steering Wheel And Column
• Suspension
  • Electronic Suspension Control System
  • Front Suspension
    • Front Suspension
    • Suspension General Diagnosis
  • Rear Suspension
    • Rear Suspension
    • Suspension General Diagnosis
  • Wheel Alignment
    • CADILLAC Wheel Alignment Specifications - ATS
    • Wheel Alignment
  • Wheels & Tire System
    • Tire Pressure Monitoring System
    • Tires And Wheels
• Transmission
  • Automatic Trans
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Component Locator
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Description And Operation
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Diagnostic Information And Procedures
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Repair Instructions - Off Vehicle
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Repair Instructions - On Vehicle
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Schematic Wiring Diagrams
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Special Tools And Equipment
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Specifications
    • Shift Lock Control System
    • Transmission Cooling System
  • Hydraulic Diagrams
    • Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Description And Operation
  • Transfer Case - BW 4474
• External Pages