Repair and Diagnosis

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• Quick Lookups
  • Electrical Component Locations
    • Diagnostic Connector (DLC) Locations
    • Electrical Component Locator
  • Technical Bulletins
    • Safety Recalls
    • Tech Tips
    • Technical Service Bulletins
  • Wiring Diagrams
    • System Wiring Diagrams - P35
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Diagrams
• Accessories & Equipment
  • Horns
    • Steering Wheel & Horn Removal
  • Steering Column Switches
    • Steering Column Switches
    • Turn Signals & Hazard Flashers
  • Wiper/Washer Systems
    • Wiper/Washer System - Square Motor
• Brakes
  • Mechanical - Hydraulic
    • Brake System Bleeding
    • Disc & Drum - "C", "G", "K" & "P" Series
• Drivelines & Axles
  • Differentials & Drive Axles
    • Drive Axle - 10.5"
    • Drive Axle - 12"
    • Drive Axle - 7.5, 8.5, 9.5
    • Drive Axle - EATON 2-Piece Differential Type
    • Drive Axle Ratio Identification
  • Driveshaft & Universal Joints
    • Drive Shaft Alignment
• Electrical
  • Charging Systems
    • Alternator - DELCO W/Integral Regulator
  • Component Locations
    • Diagnostic Connector (DLC) Locations
    • Electrical Component Locator
  • Fuses & Circuit Breakers
    • Fuse & Flasher Locations - All Models
  • Horns
    • Steering Wheel & Horn Removal
  • Starter
    • Starter - DELCO-REMY
    • Starter Removal & Installation
  • Wiring Diagrams
    • System Wiring Diagrams - P35
    • Using lemon2025'S System Wiring Diagrams
    • Wiring Diagrams
• Engine Mechanical
  • Auxiliary Emission Control Systems
    • Emission Control System Visual Inspection Procedures - General Information
  • Engine Cooling Fan
  • Cooling System (Mechanical)
    • Cooling System Specifications
  • Mechanical
    • 4.3L V6 - VIN [N]
    • 5.0L (305") V8 - VIN [F]
    • 5.0L (305") V8 - VIN [H]
    • 5.7L V8 - VIN [L]
    • 5.7L V8 - VIN [M]
    • 6.2L V8 Diesel - VINS [C,J]
    • Engine Oil Pan Removal - V6
    • Engine Oil Pan Removal - V8
    • Engine Removal - V6
    • Engine Removal - V8
  • Starter
    • Starter - DELCO-REMY
    • Starter Removal & Installation
• Engine Performance
  • Adjustment
    • Tune-Up - 4.8L 6-CYL
    • Tune-Up - Diesel
    • Tune-Up - V8
  • Emissions
    • Emission Applications - Diesel
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Ignition System
    • Ignition System - HEI (Federal)
    • Ignition System - HEI-Est (CALIF)
  • Remove, Overhaul & Install
    • CCC Component Removal & Installation
    • CEC Components Removal & Installation - Diesel
  • Specifications
    • E4MC 4-Bbl Specification
    • E4ME 4-Bbl Specification
    • TBI Design Specifications
  • System
    • 4.3L/5.0L/5.7L Tests W/Codes
    • AIR CLEANER - THERMOSTATIC (except S-Series)
    • Air Injection System
    • Carburetor - ROCHESTER M4M Series 4-Bbl
    • Catalytic Converter
    • CCC Tests W/O Codes (Trouble Shooting)
    • Diesel CEC Tests W/Codes
    • EARLY FUEL EVAPORATION SYSTEM (Except S Series)
    • EGR Function Testing - Diesel
    • EGR Function Testing - Gasoline
    • EGR System - Diesel
    • EGR System - Gasoline
    • Fuel Evaporation System
    • Fuel Injection System - 6.2L Diesel
    • PCV System
    • Throttle Return Control System
    • VACUUM ADVANCE SPARK CONTROL SYSTEM (Except S-Series)
    • Vacuum Pumps - Except "S" Series
  • Testing & Diagnosis
    • 4.3L/5.0L/5.7L Tests W/Codes
    • AIR CLEANER - THERMOSTATIC (except S-Series)
    • Air Injection System
    • Carburetor - ROCHESTER M4M Series 4-Bbl
    • Catalytic Converter
    • CCC Tests W/O Codes (Trouble Shooting)
    • Diesel CEC Tests W/Codes
    • EARLY FUEL EVAPORATION SYSTEM (Except S Series)
    • EGR Function Testing - Diesel
    • EGR Function Testing - Gasoline
    • EGR System - Diesel
    • EGR System - Gasoline
    • Fuel Evaporation System
    • Fuel Injection System - 6.2L Diesel
    • PCV System
    • Throttle Return Control System
    • VACUUM ADVANCE SPARK CONTROL SYSTEM (Except S-Series)
    • Vacuum Pumps - Except "S" Series
  • Theory and Operation
    • Diesel CEC Theory/Operation
  • Tune-Up
    • Ignition System - HEI (Federal)
    • Ignition System - HEI-Est (CALIF)
  • VACUUM DIAGRAMS - Except S-Series Truck
• 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
  • Computer Relearn Procedures
  • Driveline/Axles
    • Drive Axle Noise Diagnosis - General Information
    • Gear Tooth Contact Patterns - General Information
    • Map - Drive Train & Transmission
    • Trouble Shooting - Clutches - General Information
  • 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
  • Identification
    • CANADIAN Model Cross-Reference
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • Maintenance Reminder Light (Reset Procedures)
  • RPO Codes
    • RPO Code Description (Codes 001-19F)
    • RPO Code Description (Codes 19H-2EL)
    • RPO Code Description (Codes 2F1-44I)
    • RPO Code Description (Codes 44L-5J9)
    • RPO Code Description (Codes 5K0-6FF)
    • RPO Code Description (Codes 6FG-76A)
    • RPO Code Description (Codes 76D-7XD)
    • RPO Code Description (Codes 7XF-8M0)
    • RPO Code Description (Codes 8M1-9C0)
    • RPO Code Description (Codes 9C1-A0F)
    • RPO Code Description (Codes A0G-Ar4)
    • RPO Code Description (Codes Ar5-BCP)
    • RPO Code Description (Codes BCQ-C12)
    • RPO Code Description (Codes C13-Cur)
    • RPO Code Description (Codes Cut-Dir)
    • RPO Code Description (Codes Dr7-EHE)
    • RPO Code Description (Codes EHF-F5P)
    • RPO Code Description (Codes F5Q-G1V)
    • RPO Code Description (Codes G1W-HFN)
    • RPO Code Description (Codes HFO-JRG)
    • RPO Code Description (Codes JRH-KLY)
    • RPO Code Description (Codes KLZ-LQX)
    • RPO Code Description (Codes LQY-MW9)
    • RPO Code Description (Codes MWE-ODK)
    • RPO Code Description (Codes ODL-Ora)
    • RPO Code Description (Codes Orb-PDE)
    • RPO Code Description (Codes PDF-QH6)
    • RPO Code Description (Codes QH7-R8D)
    • RPO Code Description (Codes R8E-T07)
    • RPO Code Description (Codes T08-TJ0)
    • RPO Code Description (Codes TJ1-U10)
    • RPO Code Description (Codes USB-VG9)
    • RPO Code Description (Codes VGA-W5Y)
    • RPO Code Description (Codes W5Z-XE3)
    • RPO Code Description (Codes XE4-Y9Z)
    • RPO Code Description (Codes Ya2-ZD9)
    • RPO Code Description (Codes ZDE-ZZZ)
  • 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)
  • A/C Compressor Oil Checking
  • General Servicing
    • A/C Compressor Overhaul - DAV5
    • A/C System General Servicing
    • A/C System Precautions
  • HVAC Control Systems
    • A/C System Diagnosis - Manual
• Steering
  • Manual Steering
    • Power Steering General Servicing
    • Power Steering Pump
    • Steering Gear - Power
  • Power Steering
    • Power Steering General Servicing
    • Power Steering Pump
    • Steering Gear - Power
  • Steering Column
    • Steering Column
    • Steering Wheel & Horn Removal
  • Steering Gear - Manual
  • Steering Linkage
• Suspension
  • Front Suspension
    • Suspension - Front (2WD Coil)
  • Wheel Alignment
    • Jacking & Hoisting
    • Pre-Alignment Checks
    • Riding Height Adjustment
    • Towing Procedures
• Transmission
  • Automatic Trans
    • Overhaul - THM 400
    • Removal & Installation - A/T - Except "S" Series
    • Servicing - A/T
    • Transmission Oil Pan Gasket Id
  • Clutches
  • Manual Trans
    • Overhaul - Gm 117 4-Speed
    • Removal & Installation - M/T
    • Servicing - M/T
• External Pages