Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
  • DTC Index
  • Electrical Component Locations
    • Electrical Component Locator And Wiring Harness Routing Views
  • Fluids
  • Technical Bulletins
    • Campaigns
    • Safety Recalls
    • Technical Service Bulletins
  • Wiring Diagrams
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B5RR)
    • Component Connector End Views (B306H-E13LA)
    • Component Connector End Views (B7LF-B306G)
    • Component Connector End Views (E13RA-K9 (X2))
    • Component Connector End Views (K124-M6PR)
    • Component Connector End Views (K36-K124)
    • Component Connector End Views (K9 ( X3)-K36)
    • Component Connector End Views (M8-Q112)
    • Component Connector End Views (Q113-T10KA)
    • Component Connector End Views (T10LRD-X98)
    • Electrical Center Identification Views
    • Electrical Component Locator And Wiring Harness Routing Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X140F-X191L)
    • Inline Harness Connector End Views (X191R-X418)
    • Inline Harness Connector End Views (X501-X613RR)
    • Inline Harness Connector End Views (X615CD-X615RL)
    • Inline Harness Connector End Views (X615RR-X627R)
    • Inline Harness Connector End Views (X701-X939)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Accessories & Equipment
  • Anti-Theft Systems
    • Immobilizer System
    • Keyless Entry And Remote Functions
    • Power Door Locks And Vehicle Access System - Description And Operation
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (1 Of 2)
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (2 Of 2)
    • Power Door Locks And Vehicle Access System - Fastener Specifications
    • Power Door Locks And Vehicle Access System - Repair Instructions
    • Power Door Locks And Vehicle Access System - Schematic Wiring Diagrams
    • Theft Deterrent System
  • Body Interior
    • Power Door Locks And Vehicle Access System - Description And Operation
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (1 Of 2)
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (2 Of 2)
    • Power Door Locks And Vehicle Access System - Fastener Specifications
    • Power Door Locks And Vehicle Access System - Repair Instructions
    • Power Door Locks And Vehicle Access System - Schematic Wiring Diagrams
    • Secondary And Configurable Customer Controls
  • Collision/Avoidance
    • Driver Assistance Systems - Description And Operation
    • Driver Assistance Systems - Diagnostic Information And Procedures
    • Driver Assistance Systems - Fastener Specifications
    • Driver Assistance Systems - Repair Instructions
    • Driver Assistance Systems - Schematic Wiring Diagrams
    • Driver Monitoring System
    • Image Display Cameras
    • Parking Assistance Systems
  • Communication Devices
    • Data Communications - Data Link Communications Description And Operation
    • Data Communications - Diagnostic Information And Procedures (1 Of 4)
    • Data Communications - Diagnostic Information And Procedures (2 Of 4)
    • Data Communications - Diagnostic Information And Procedures (3 Of 4)
    • Data Communications - Diagnostic Information And Procedures (4 Of 4)
    • Data Communications - Repair Instructions
    • Data Communications - Schematic Wiring Diagrams
    • Programming And Setup - All Systems
  • Cruise Control Systems
  • Drivers Assistance Systems - ADAS
    • Driver Assistance Systems - Description And Operation
    • Driver Assistance Systems - Diagnostic Information And Procedures
    • Driver Assistance Systems - Fastener Specifications
    • Driver Assistance Systems - Repair Instructions
    • Driver Assistance Systems - Schematic Wiring Diagrams
    • Driver Monitoring System
    • Image Display Cameras
    • Parking Assistance Systems
  • Entertainment Systems
    • Cellular, Entertainment, And Navigation - Description And Operation
    • Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures
    • Cellular, Entertainment, And Navigation - Fastener Specifications
    • Cellular, Entertainment, And Navigation - Repair Instructions
    • Cellular, Entertainment, And Navigation - Schematic Wiring Diagrams
    • Cellular, Entertainment, And Navigation - Special Tools And Equipment
    • 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
    • Instrument Panel Trim And Console Trim
    • Instrument Panel, Displays And Gauges
  • 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
  • Ignition Switch/Steering Lock
    • Immobilizer System
  • Infotainment
    • Cellular, Entertainment, And Navigation - Description And Operation
    • Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures
    • Cellular, Entertainment, And Navigation - Fastener Specifications
    • Cellular, Entertainment, And Navigation - Repair Instructions
    • Cellular, Entertainment, And Navigation - Schematic Wiring Diagrams
    • Cellular, Entertainment, And Navigation - Special Tools And Equipment
    • Image Display Cameras
  • Interior/Exterior Trim
    • Bolted Exterior Body Panels And Closures
    • Exterior Trim
    • Floor Coverings And HEADLININGS
    • Instrument Panel Trim And Console Trim
    • Interior Trim And Interior Paneling
    • Seat Hardware, Seat 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, Seat Trim, And Upholstery
    • Seat Heating And Seat Cooling System
  • Steering Column Switches
    • Secondary And Configurable Customer Controls
  • Warning Systems
    • Driver Monitoring System
    • Parking Assistance Systems
    • Tire Pressure Monitoring System
  • Window Motors & Regulators
    • Fixed And MOVEABLE Windows
  • Wiper/Washer Systems
    • Wiper System And Washer System
• Body & Frame
  • Body, Cab Control Systems
    • Power Door Locks And Vehicle Access System - Description And Operation
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (1 Of 2)
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (2 Of 2)
    • Power Door Locks And Vehicle Access System - Fastener Specifications
    • Power Door Locks And Vehicle Access System - Repair Instructions
    • Power Door Locks And Vehicle Access System - Schematic Wiring Diagrams
    • Secondary And Configurable Customer Controls
  • Door Locks
    • Immobilizer System
    • Keyless Entry And Remote Functions
    • Power Door Locks And Vehicle Access System - Description And Operation
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (1 Of 2)
    • Power Door Locks And Vehicle Access System - Diagnostic Information And Procedures (2 Of 2)
    • Power Door Locks And Vehicle Access System - Fastener Specifications
    • Power Door Locks And Vehicle Access System - Repair Instructions
    • Power Door Locks And Vehicle Access System - Schematic Wiring Diagrams
    • Theft Deterrent System
  • Exterior Body Panels
    • Air/Wind Noise
    • Bumpers And Fascias
    • Squeaks And Rattles
  • Exterior/Interior Trim
    • Bolted Exterior Body Panels And Closures
    • Exterior Trim
    • Floor Coverings And HEADLININGS
    • Instrument Panel Trim And Console Trim
    • Interior Trim And Interior Paneling
    • Seat Hardware, Seat Trim, And Upholstery
  • Frames, Subframes & Crossmembers
    • Frame And Underbody
  • Ignition Switch/Steering Lock
    • Immobilizer System
  • Mirrors
  • Seats
    • Power Seats
    • Seat Hardware, Seat Trim, And Upholstery
    • Seat Heating And Seat Cooling System
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Towing Systems
    • TRAILERING Systems
  • Fixed And MOVEABLE Windows
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
  • Mechanical - Hydraulic
    • Disc Brakes
    • Hydraulic Brakes
  • Parking Brake System
    • Park Brake
  • Traction Control
    • Antilock Brake System
• Drivelines & Axles
  • Axle Shafts
    • Wheel Drive Shafts
• Electrical
  • Body Electrical
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B5RR)
    • Component Connector End Views (B306H-E13LA)
    • Component Connector End Views (B7LF-B306G)
    • Component Connector End Views (E13RA-K9 (X2))
    • Component Connector End Views (K124-M6PR)
    • Component Connector End Views (K36-K124)
    • Component Connector End Views (K9 ( X3)-K36)
    • Component Connector End Views (M8-Q112)
    • Component Connector End Views (Q113-T10KA)
    • Component Connector End Views (T10LRD-X98)
    • Electric Drive Transmission (P77)
    • Electric Drive Transmission (S76)
    • Electrical Center Identification Views
    • Electrical Component Locator And Wiring Harness Routing Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X140F-X191L)
    • Inline Harness Connector End Views (X191R-X418)
    • Inline Harness Connector End Views (X501-X613RR)
    • Inline Harness Connector End Views (X615CD-X615RL)
    • Inline Harness Connector End Views (X615RR-X627R)
    • Inline Harness Connector End Views (X701-X939)
    • Master Electrical Component List
    • Plug-In Charging System
    • Power Outlets
    • Wire And Connector Repair
    • 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 - 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 - Vehicle Zoning Strategy
  • Charging Systems
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment
    • 12 V Starting And Charging - Specifications
    • Plug-In Charging System
  • Component Locations
    • Electrical Component Locator And Wiring Harness Routing Views
  • Gauges
    • Instrument Panel Trim And Console Trim
    • Instrument Panel, Displays And Gauges
  • Horns And Pedestrian Alerts
  • Motors, Switches, Relays
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B5RR)
    • Component Connector End Views (B306H-E13LA)
    • Component Connector End Views (B7LF-B306G)
    • Component Connector End Views (E13RA-K9 (X2))
    • Component Connector End Views (K124-M6PR)
    • Component Connector End Views (K36-K124)
    • Component Connector End Views (K9 ( X3)-K36)
    • Component Connector End Views (M8-Q112)
    • Component Connector End Views (Q113-T10KA)
    • Component Connector End Views (T10LRD-X98)
    • Electric Drive Transmission (P77)
    • Electric Drive Transmission (S76)
    • Electrical Center Identification Views
    • Electrical Component Locator And Wiring Harness Routing Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X140F-X191L)
    • Inline Harness Connector End Views (X191R-X418)
    • Inline Harness Connector End Views (X501-X613RR)
    • Inline Harness Connector End Views (X615CD-X615RL)
    • Inline Harness Connector End Views (X615RR-X627R)
    • Inline Harness Connector End Views (X701-X939)
    • Master Electrical Component List
    • Plug-In Charging System
    • Power Outlets
    • Wire And Connector Repair
    • 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 - 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 - Vehicle Zoning Strategy
  • Starter
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment
    • 12 V Starting And Charging - Specifications
  • Wiring Diagrams
    • Component Connector End Views - Index
    • Component Connector End Views (A3L-B5RR)
    • Component Connector End Views (B306H-E13LA)
    • Component Connector End Views (B7LF-B306G)
    • Component Connector End Views (E13RA-K9 (X2))
    • Component Connector End Views (K124-M6PR)
    • Component Connector End Views (K36-K124)
    • Component Connector End Views (K9 ( X3)-K36)
    • Component Connector End Views (M8-Q112)
    • Component Connector End Views (Q113-T10KA)
    • Component Connector End Views (T10LRD-X98)
    • Electrical Center Identification Views
    • Electrical Component Locator And Wiring Harness Routing Views
    • Inline Harness Connector End Views - Index
    • Inline Harness Connector End Views (X140F-X191L)
    • Inline Harness Connector End Views (X191R-X418)
    • Inline Harness Connector End Views (X501-X613RR)
    • Inline Harness Connector End Views (X615CD-X615RL)
    • Inline Harness Connector End Views (X615RR-X627R)
    • Inline Harness Connector End Views (X701-X939)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Engine Mechanical
  • Lubrication System
    • Maintenance And Lubrication
  • Starter
    • 12 V Starting And Charging - Description And Operation
    • 12 V Starting And Charging - Diagnostic Information And Procedures
    • 12 V Starting And Charging - Repair Instructions
    • 12 V Starting And Charging - Schematic Wiring Diagrams
    • 12 V Starting And Charging - Special Tools And Equipment
    • 12 V Starting And Charging - Specifications
• Engine Performance
  • Emissions
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • System
    • Data Communications - Diagnostic Information And Procedures (1 Of 4)
  • Testing & Diagnosis
    • Data Communications - Diagnostic Information And Procedures (1 Of 4)
• 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
    • Dangers, Warnings, And Cautions
    • General Information
    • Vehicle Diagnostic Information And Procedures - Diagnostic Procedure Instructions
    • Vehicle Diagnostic Information And Procedures - Diagnostic Repair Verification
    • Vehicle Diagnostic Information And Procedures - Diagnostic Starting Point - Vehicle
    • Vehicle Diagnostic Information And Procedures - Diagnostic System Check - Vehicle
    • Vehicle Diagnostic Information And Procedures - Diagnostic System Check Instructions
    • Vehicle Diagnostic Information And Procedures - Diagnostic Trouble Code (DTC) List - Vehicle
    • Vehicle Diagnostic Information And Procedures - DTC Status Information
    • Vehicle Diagnostic Information And Procedures - Inspection/Maintenance System Check
    • Vehicle Diagnostic Information And Procedures - Powertrain Diagnostic Trouble Code (DTC) Type Definitions
    • Vehicle Diagnostic Information And Procedures - Strategy Based Diagnosis
    • Vehicle Diagnostic Information And Procedures - Symptom Byte List
    • Vehicle Diagnostic Information And Procedures - Symptoms - Vehicle
    • 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 - All 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 - Description And Operation
    • Heating, Ventilation, And Air Conditioning - Diagnostic Information And Procedures
    • Heating, Ventilation, And Air Conditioning - Repair Instructions (1 Of 2)
    • Heating, Ventilation, And Air Conditioning - Repair Instructions (2 Of 2)
    • Heating, Ventilation, And Air Conditioning - Special Tools And Equipment
    • Heating, Ventilation, And Air Conditioning - Specifications
    • Heating, Ventilation, And Air Conditioning - Visual Identification - Refrigerant Label Symbols
    • HVAC - Automatic - Description And Operation
    • HVAC - Automatic - Diagnostic Information And Procedures
    • HVAC - Automatic - Fastener Specifications
    • HVAC - Automatic - Repair Instructions
    • HVAC - Automatic - Schematic Wiring Diagrams
• Hybrid/Electric Powertrain
  • Battery Management Systems
    • Hybrid/EV Energy Storage - Diagnostic Information And Procedures (1 Of 2)
    • Hybrid/EV Energy Storage - Diagnostic Information And Procedures (2 Of 2)
    • Hybrid/EV Energy Storage - Drive Motor Battery System Description And Operation
    • Hybrid/EV Energy Storage - Fastener Specifications
    • Hybrid/EV Energy Storage - Repair Instructions
    • Hybrid/EV Energy Storage - Schematic Wiring Diagrams
    • Hybrid/EV Energy Storage - Special Tools And Equipment
    • Plug-In Charging System
  • Cooling Systems
    • Hybrid/EV System Heating And Cooling - Description And Operation
    • Hybrid/EV System Heating And Cooling - Diagnostic Information And Procedures
    • Hybrid/EV System Heating And Cooling - Repair Instructions
    • Hybrid/EV System Heating And Cooling - Schematic Wiring Diagrams
    • Hybrid/EV System Heating And Cooling - Special Tools And Equipment
    • Hybrid/EV System Heating And Cooling - Specifications
  • Electric Converters and Controllers
    • Hybrid/EV Controls
    • Plug-In Charging System
  • Testing and Diagnosis
    • Hybrid/EV Energy Storage - Diagnostic Information And Procedures (1 Of 2)
    • Hybrid/EV Energy Storage - Diagnostic Information And Procedures (2 Of 2)
    • Hybrid/EV System Heating And Cooling - Diagnostic Information And Procedures
• 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 Wheel And Steering Column
• Suspension
  • Front Suspension
    • Front Suspension
    • Suspension General Diagnosis
  • Rear Suspension
    • Rear Suspension
    • Suspension General Diagnosis
  • Wheel Alignment
    • CADILLAC Wheel Alignment Specifications - LYRIQ
    • Wheel Alignment
  • Wheels & Tire System
    • Tire Pressure Monitoring System
    • Tires And Wheels
• Transmission
  • Automatic Trans
    • Electric Drive Transmission (P77)
    • Electric Drive Transmission (S76)
    • Electronic Transmission Range Select
  • Transmission Control Systems
    • Electric Drive Transmission (P77)
    • Electric Drive Transmission (S76)