Repair and Diagnosis

A L L Diagnostic Trouble Codes ( DTC )
Relays and Modules
- Relays and Modules - Accessories and Optional Equipment
- Relays and Modules - Body and Frame
  - Seat Temperature Control Module
- Relays and Modules - Brakes and Traction Control
  - Electronic Brake Control Module
- Relays and Modules - HVAC
- Relays and Modules - Lighting and Horns
- Relays and Modules - Power and Ground Distribution
  - Accessory Relay
  - Power Distribution Relay
- Relays and Modules - Powertrain Management
- Relays and Modules - Restraints and Safety Systems
  - Air Bag Control Module
  - Seat Occupant Classification Module - Air Bag
- Relays and Modules - Starting and Charging
  - Battery Control Module
  - Starter Relay
- Relays and Modules - Transmission and Drivetrain
  - Relays and Modules - Transfer Case
    - Control Module
- Relays and Modules - Wiper and Washer Systems
  - Wiper Relay
Sensors and Switches
- Sensors and Switches - Accessories and Optional Equipment
  - Integrated Accessory Switch Assembly
- Sensors and Switches - Body and Frame
- Sensors and Switches - Brakes and Traction Control
- Sensors and Switches - Cooling System
  - Engine - Coolant Temperature Sensor/Switch
    - Coolant Temperature Sensor/Switch (For Computer)
- Sensors and Switches - Cruise Control
  - Brake Switch (Cruise Control)
  - Clutch Switch
- Sensors and Switches - Engine
  - Oil Pressure Sensor
- Sensors and Switches - HVAC
- Sensors and Switches - Instrument Panel
- Sensors and Switches - Lighting and Horns
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Restraints and Safety Systems
- Sensors and Switches - Starting and Charging
  - Clutch Switch
  - Ignition Switch
- Sensors and Switches - Steering and Suspension
  - Sensors and Switches - Wheels and Tires
    - Tire Pressure Sensor
- Sensors and Switches - Transmission and Drivetrain
- Sensors and Switches - Windows and Glass
  - Power Window Switch
Maintenance
- Alignment
- Tune-up and Engine Performance Checks
- Timing Component Alignment Marks
- Drive Belt
- Filters
- Hoses
- Fluids
- Brake Bleeding
- Air Bag(s) Arming and Disarming
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Jump Starting
- Vehicle Lifting
- Service Intervals
- Technical Service Bulletins
Engine, Cooling and Exhaust
- Engine
- Cooling System
- Exhaust System
- Technical Service Bulletins
Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- Emission Control Systems
- Fuel Delivery and Air Induction
- Ignition System
- Transmission Control Systems
- Locations
- Diagrams
- Specifications
- Technical Service Bulletins
Transmission and Drivetrain
- Actuators and Solenoids - Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Clutch
- Differential Assembly
- Drive Axles, Bearings and Joints
- Drive/Propeller Shafts, Bearings and Joints
- Flex Plate
- Flywheel
- Manual Transmission/Transaxle
- Relays and Modules - Transmission and Drivetrain
  - Relays and Modules - Transfer Case
    - Control Module
- Sensors and Switches - Transmission and Drivetrain
- Transfer Case
- Transmission Control Systems
- Technical Service Bulletins
Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- Brake Bleeding
- Brake Pedal Assy
- Disc Brake System
- Drum Brake System
- Hydraulic System
- Parking Brake System
- Power Brake Assist
  - Vacuum Brake Booster
  - Vacuum Brake Booster Check Valve
- Relays and Modules - Brakes and Traction Control
  - Electronic Brake Control Module
- Sensors and Switches - Brakes and Traction Control
- Specifications
  - Drum Brake Component Specifications
  - Disc Brake Component Specifications
Starting and Charging
- Sensors and Switches - Starting and Charging
  - Clutch Switch
  - Ignition Switch
- Relays and Modules - Starting and Charging
  - Battery Control Module
  - Starter Relay
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- Description and Operation
- Testing and Inspection
- Locations
- Diagrams
- Specifications
- Technical Service Bulletins
- Tools and Equipment
Power and Ground Distribution
- Accessory Relay
- Auxiliary Power Outlet
- Branching Point
- Fuse
- Fuse Block
- Multiple Junction Connector
- Power Distribution Relay
- Relays and Modules - Power and Ground Distribution
  - Accessory Relay
  - Power Distribution Relay
- Wiring Harness
- Service Precautions
  - Technician Safety Information
  - Vehicle Damage Warnings
- Description and Operation
  - Power Mode
  - Retained Accessory Power (RAP)
- Testing and Inspection
- Locations
- Diagrams
- Specifications
- Technical Service Bulletins
- Tools and Equipment
Steering and Suspension
- Alignment
- Sensors and Switches - Steering and Suspension
  - Sensors and Switches - Wheels and Tires
    - Tire Pressure Sensor
- Steering
- Suspension
- Wheels and Tires
- Technical Service Bulletins
Heating and Air Conditioning
- Air Door
  - Air Door Actuator / Motor
  - Air Door Cable
  - Service and Repair
- Air Duct
- Air Register
- Ambient Temperature Sensor / Switch HVAC
- Blower Motor
- Blower Motor Relay
- Blower Motor Resistor
- Cabin Ventilation Duct
- Cabin Ventilation Grille
- Compressor HVAC
  - Compressor Clutch
  - Compressor Clutch Hub
  - Service and Repair
    - Procedures
    - Removal and Replacement
- Compressor Clutch Relay
- Condenser HVAC
- Control Assembly
- Control Module HVAC
- Coupler HVAC
  - A/C Coupler O-ring
- Evaporator Core
- Evaporator Drain Tube
- Evaporator Temperature Sensor / Switch
- Expansion Valve
- Heater Core
- Heater Hose
- Hose/Line HVAC
- Housing Assembly HVAC
- Receiver Dryer
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
  - Blower Motor Relay
  - Compressor Clutch Relay
  - Control Module HVAC
- Sensors and Switches - HVAC
  - Ambient Temperature Sensor / Switch HVAC
  - Evaporator Temperature Sensor / Switch
  - Refrigerant Pressure Sensor / Switch
- Description and Operation
  - Air Delivery Description and Operation
  - Air Temperature Description and Operation
- Testing and Inspection
  - Initial Inspection and Diagnostic Overview
    - Diagnostic Starting Point - Heating, Ventilation and Air Conditioning
    - Air Conditioning (A/C) System Performance Test
  - Symptom Related Diagnostic Procedures
    - Heating, Ventilation, and Air Conditioning
    - HVAC - Manual
  - Component Tests and General Diagnostics
  - Scan Tool Testing and Procedures
- Locations
  - HVAC Components
  - HVAC Module Assembly Subsystem Views
- Service and Repair
  - Odor Correction
  - Refrigerant Recovery and Recharging
  - A/C Refrigerant System Oil Charge Replenishing
  - Flushing
- Diagrams
  - Diagram Information and Instructions
    - Electrical Symbols
    - Truck Zoning
  - Diagnostic Aids
  - Connector Views
  - Electrical Diagrams
- Specifications
  - Electrical Specifications
  - Mechanical Specifications
    - Heating, Ventilation, and Air Conditioning
    - HVAC - Manual
  - Capacity Specifications
- Technical Service Bulletins
Restraints and Safety Systems
- Repairs and Inspections Required After a Collision
- Air Bag Systems
- Child Seat
- Head Restraint System
  - Head Rest
- Relays and Modules - Restraints and Safety Systems
  - Air Bag Control Module
  - Seat Occupant Classification Module - Air Bag
- Seat Belt Systems
- Sensors and Switches - Restraints and Safety Systems
- Technical Service Bulletins
Accessories and Optional Equipment
- Accessory Relay
- Antenna
  - Antenna Mast
  - Antenna, Navigation
  - Antenna, Phone
  - Antenna, Radio
    - Antenna Cable
    - Service and Repair
- Antitheft and Alarm Systems
  - Keyless Entry
    - Keyless Entry Transmitter
      - Keyless Entry Transmitter Battery
      - Testing and Inspection
    - Description and Operation
  - Description and Operation
    - Immobilizer Description and Operation
    - Content Theft Deterrent (CTD) Description and Operation
  - Testing and Inspection
  - Service and Repair
    - Replacing Keys
    - Adding Keys
  - Diagrams
- Cellular Phone
  - Cellular Phone Microphone
- Central Control Module
- Driver/Vehicle Information Display
- Emergency Contact Button
- Integrated Accessory Switch Assembly
- Navigation System
  - Navigation Module
- Radio, Stereo, and Compact Disc
  - Compact Disc Player (CD)
  - Radio/Stereo
  - Speaker
  - Testing and Inspection
  - Technical Service Bulletins
- Relays and Modules - Accessories and Optional Equipment
  - Accessory Relay
  - Central Control Module
  - Navigation Module
- Sensors and Switches - Accessories and Optional Equipment
  - Integrated Accessory Switch Assembly
- Towing / Trailer System
  - Towing Hook / Bracket
  - Trailer Connector
  - Trailer Hitch
- Trailer Connector
- Description and Operation
  - OnStar Description and Operation
    - Part 1
    - Part 2
  - Radio/Audio System Description and Operation
  - Personalization Description and Operation
  - Vehicle Personalization
- Testing and Inspection
  - Initial Inspection and Diagnostic Overview
  - Symptom Related Diagnostic Procedures
    - Cellular, Entertainment, and Navigation
    - Remote Functions
  - Scan Tool Testing and Procedures
    - Cellular, Entertainment, and Navigation
      - Scan Tool Data Definitions
      - Scan Tool Data List
    - Remote Functions
  - Programming and Relearning
    - Communication Interface Module Programming and Setup
    - OnStar Reconfiguration
- Locations
  - Digital Radio Receiver (With RPO Code U2K)
  - Center of the I/P
  - Driver Door
  - Front Passenger Door
  - Left Rear Door (Crew Cab)
  - Right Rear Door (Crew Cab)
  - Left Rear Door (Ext Cab)
  - Right Rear Door (Ext Cab)
- Diagrams
  - Diagram Information and Instructions
    - Electrical Symbols
    - Truck Zoning
  - Diagnostic Aids
  - Electrical Diagrams
- Specifications
- Technical Service Bulletins
Body and Frame
- Air Bag(s) Arming and Disarming
- Repairs and Inspections Required After a Collision
- Body Control Systems
  - Body Control Module
  - Description and Operation
  - Diagrams
- Bumper
  - Front Bumper
    - Front Bumper Cover / Fascia
    - Service and Repair
  - Rear Bumper
    - Rear Bumper Cover / Fascia
    - Service and Repair
      - Rear Bumper Replacement (Canyon/Colorado)
      - Rear Bumper Bracket Replacement
  - Specifications
- Cabin Ventilation Duct
- Cabin Ventilation Grille
- Doors, Hood and Trunk
  - Doors
  - Fuel Door
  - Hood
  - Trunk / Liftgate
  - Technical Service Bulletins
- Exterior Moulding / Trim
  - Body Emblem
  - Upper Side Moulding / Trim
  - Specifications
- Fender
  - Front Fender
    - Front Fender Liner
    - Service and Repair
  - Rear Fender
    - Rear Fender Liner
- Frame
  - Body / Frame Mount Bushing
  - Cross-Member
  - Skid Plate
  - Subframe
    - Front Subframe Mount
  - Trailer Hitch
  - Specifications
- Grille
- Interior Moulding / Trim
  - Arm Rest
  - Carpet
  - Console
  - Dashboard / Instrument Panel
  - Drink Holders
  - Glove Compartment
  - Headliner
  - Passenger Assist Handle
  - Scuff Plate
  - Sun Visor
  - Trim Panel
  - Utility Storage Compartment
  - Specifications
  - Technical Service Bulletins
- Locks
  - Door Locks
    - Door Lock Cylinder
    - Service and Repair
      - Front Side Door Lock Replacement
      - Rear Door Lock Replacement
  - Keyless Entry
    - Keyless Entry Transmitter
      - Keyless Entry Transmitter Battery
      - Testing and Inspection
    - Description and Operation
  - Power Locks
    - Power Door Lock Actuator
    - Power Door Lock Switch
  - Description and Operation
    - Door Ajar Indicator Description and Operation
    - Power Door Locks Description and Operation
  - Testing and Inspection
  - Locations
  - Service and Repair
  - Diagrams
  - Specifications
- Mirrors
  - Power Mirror Motor
  - Power Mirror Switch
  - Description and Operation
    - Automatic Day-Night Mirror
    - Outside Mirror
  - Testing and Inspection
    - Symptom Related Diagnostic Procedures
      - Mirrors - Automatic Day-Night Inoperative
      - Power Mirrors Inoperative
    - Programming and Relearning
  - Locations
    - Driver Door
    - Front Passenger Door
  - Service and Repair
    - Procedures
    - Removal and Replacement
  - Diagrams
  - Specifications
  - Technical Service Bulletins
- Paint, Striping and Decals
  - Paint
- Relays and Modules - Body and Frame
  - Seat Temperature Control Module
- Roof and Associated Components
  - Sunroof / Moonroof
- Seats
  - Child Seat
  - Head Rest
  - Head Restraint System
    - Head Rest
  - Power Seat Motor
  - Power Seat Motor Position Sensor
  - Power Seat Switch
  - Seat Back
  - Seat Cover
  - Seat Cushion
  - Seat Fan
  - Seat Temperature Element
  - Seat Temperature Control Module
  - Seat Temperature Switch
  - Seat Latch
  - Description and Operation
    - Lumbar Support
    - Power Seats System
    - Lumbar Support Description and Operation
  - Testing and Inspection
    - Initial Inspection and Diagnostic Overview
    - Symptom Related Diagnostic Procedures
  - Locations
    - Driver Seat
    - Driver Seat Switches
    - Passenger Seat
    - Passenger Seat Switches
  - Service and Repair
    - EZ Entry Seat Manual Release Knob Replacement
    - Front Seat Head Restraint Guide Replacement
    - Front Seat Head Restraint Replacement
    - Front Seat Replacement - Bucket
    - Lumbar Replacement - Front Seat
    - Rear Seat Head Restraint Replacement
    - Seat Adjuster Mechanism Replacement - Manual
    - Seat Replacement - Folding (Extended Cab)
    - Seat Replacement - Rear Bench
    - Seat Replacement - Split Bench
    - Seat Switch Bezel Replacement
  - Diagrams
    - Diagram Information and Instructions
      - Electrical Symbols
      - Truck Zoning
    - Diagnostic Aids
    - Electrical Diagrams
      - Driver Seat Diagrams
      - Passenger Seat Diagrams
  - Specifications
  - Technical Service Bulletins
- Sensors and Switches - Body and Frame
  - Power Door Lock Switch
  - Power Mirror Switch
  - Power Seat Motor Position Sensor
  - Power Seat Switch
  - Seat Temperature Switch
  - Sunroof / Moonroof Switch
- Splash Guard
- Tailgate
  - Tailgate Hinge
  - Tailgate Latch
  - Tailgate Lock Cylinder
  - Tailgate Release Handle
  - Service and Repair
- Tie Down Hook / Bracket
- Towing Hook / Bracket
- Truck Bed
- Weatherstrip
  - Front Door Weatherstrip
  - Hood Weatherstrip
  - Rear Door Weatherstrip
- Service Precautions
  - Technician Safety Information
  - Vehicle Damage Warnings
- Application and ID
- Testing and Inspection
  - Air/Wind Noise
    - Diagnostic Information and Procedures
    - Repair Instructions
      - Exterior Windnoise
      - Interior Windnoise
  - Squeaks and Rattles
  - Waterleaks
    - Diagnostic Information and Procedures
    - Repair Instructions
      - Body Waterleak Repair
      - Stationary Window Waterleak Repair
- Locations
  - Panel Identification
  - Visual Identification
- Specifications
  - Fastener Tightening Specifications
  - Bolted Exterior Body Panels and Closures
- Technical Service Bulletins
Cruise Control
- Brake Switch (Cruise Control)
- Clutch Switch
- Sensors and Switches - Cruise Control
  - Brake Switch (Cruise Control)
  - Clutch Switch
- Description and Operation
- Testing and Inspection
- Locations
- Diagrams
Instrument Panel, Gauges and Warning Indicators
- Cigarette Lighter
- Compass
- Dashboard / Instrument Panel
  - Air Bag(s) Arming and Disarming
  - Service and Repair
  - Specifications
  - Technical Service Bulletins
- Dimmer Switch
- Door/Trunk Ajar Indicator/Lamp
- Door Switch
- Driver/Vehicle Information Display
- Fuel Gauge
- Fuel Gauge Sender
- Instrument Cluster / Carrier
  - Air Bag(s) Arming and Disarming
  - Description and Operation
  - Testing and Inspection
  - Service and Repair
    - Instrument Cluster Replacement
    - Instrument Cluster Lens Replacement
  - Diagrams
- Low Tire Pressure Indicator
- Maintenance Required Lamp/Indicator
- Malfunction Indicator Lamp
- Parking Brake Warning Switch
- Sensors and Switches - Instrument Panel
  - Dimmer Switch
  - Door Switch
  - Fuel Gauge Sender
  - Parking Brake Warning Switch
- Tire Monitoring System
  - Low Tire Pressure Indicator
  - Tire Pressure Sensor
  - Description and Operation
  - Testing and Inspection
  - Locations
  - Service and Repair
    - Tire Pressure Monitor System Configuration
    - Tire Pressure Sensor Learn
  - Diagrams
  - Tools and Equipment
- Description and Operation
  - Audible Warnings Description and Operation
  - Indicator/Warning Message Description and Operation
- Testing and Inspection
  - Initial Inspection and Diagnostic Overview
  - Symptom Related Diagnostic Procedures
  - Scan Tool Testing and Procedures
- Locations
- Diagrams
  - Diagram Information and Instructions
    - Electrical Symbols
    - Truck Zoning
  - Diagnostic Aids
  - Electrical Diagrams
    - Audible Warnings Schematics
    - Instrument Cluster Schematics
- Specifications
- Technical Service Bulletins
Lighting and Horns
- Ambient Light Sensor
- Backup Lamp
  - Backup Lamp Switch
  - Backup Light Bulb
  - Testing and Inspection
  - Diagrams
- Brake Lamp
- Brake Light Switch
- Cargo Lamp
- Center Mounted Brake Lamp
  - Center Mounted Brake Lamp Bulb
  - Service and Repair
  - Diagrams
- Courtesy Lamp
- Daytime Running Lamp
- Dimmer Switch
- Dome Lamp
- Door Switch
- Fog/Driving Lamp
  - Fog/Driving Lamp Bulb
  - Fog/Driving Lamp Relay
  - Testing and Inspection
  - Adjustments
  - Service and Repair
    - Front Fog Lamp Replacement (Canyon)
    - Front Fog Lamp Replacement (XTREME)
  - Diagrams
- Hazard Warning Lamps
  - Hazard Warning Switch
  - Testing and Inspection
  - Diagrams
- Headlamp
  - Headlamp Bulb
  - Headlamp Dimmer Relay
  - Headlamp Relay
  - Headlamp Switch
  - Testing and Inspection
  - Adjustments
  - Service and Repair
  - Diagrams
- Horn
  - Horn Relay
  - Horn Switch
  - Description and Operation
  - Testing and Inspection
  - Locations
    - Front of the Engine Compartment
    - Steering Wheel Module
  - Service and Repair
  - Diagrams
  - Specifications
- License Plate Lamp
  - License Plate Bulb
  - Testing and Inspection
  - Diagrams
- Marker Lamp
  - Marker Lamp Bulb
  - Testing and Inspection
  - Diagrams
- Parking Lamp
  - Parking Lamp Relay
  - Parking Light Bulb
  - Testing and Inspection
  - Diagrams
  - Technical Service Bulletins
- Relays and Modules - Lighting and Horns
  - Fog/Driving Lamp Relay
  - Headlamp Dimmer Relay
  - Headlamp Relay
  - Horn Relay
  - Parking Lamp Relay
- Sensors and Switches - Lighting and Horns
  - Ambient Light Sensor
  - Backup Lamp Switch
  - Brake Light Switch
  - Combination Switch
  - Door Switch
  - Hazard Warning Switch
  - Headlamp Switch
  - Horn Switch
  - Turn Signal Switch
- Tail Lamp
  - Tail Light Bulb
  - Testing and Inspection
  - Service and Repair
  - Diagrams
- Turn Signals
  - Combination Switch
  - Turn Signal Lamp
  - Turn Signal Switch
  - Testing and Inspection
  - Diagrams
- Vanity Lamp
- Description and Operation
  - Exterior Lighting Systems
  - Interior Lighting Systems
- Testing and Inspection
  - Initial Inspection and Diagnostic Overview
  - Symptom Related Diagnostic Procedures
  - Scan Tool Testing and Procedures
- Locations
  - Backup Lamp Switch
  - Dome Lamp
  - Door Jamb Switch - Driver (EXT Cab) Front Passenger Similar
  - Door Jamb Switch - Driver (Regular Cab) Front Passenger Similar
  - Front Exterior Lights
  - Left Door Jamb Switches (Crew Cab) Right Similar
  - Lower Center of I/P
  - Lower Left of the I/P
  - Center of the I/P
  - Rear Exterior Lights
- Diagrams
  - Diagram Information and Instructions
    - Electrical Symbols
    - Truck Zoning
  - Diagnostic Aids
  - Electrical Diagrams
- Specifications
- Technical Service Bulletins
Windows and Glass
- Sensors and Switches - Windows and Glass
  - Power Window Switch
- Windows
- Windshield
- Service Precautions
- Technical Service Bulletins
Wiper and Washer Systems
- Relays and Modules - Wiper and Washer Systems
  - Wiper Relay
- Windshield Washer Hose
- Windshield Washer Pump
- Windshield Washer Reservoir
- Windshield Washer Spray Nozzle
- Wiper Arm
- Wiper Blade
- Wiper Gear Box
- Wiper Motor
- Wiper Relay
- Description and Operation
- Testing and Inspection
- Locations
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Tools and Equipment
Service Precautions
Application and ID
- Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label
- Registered and Non-Registered Trademarks
- RPO Code List
- Vehicle, Engine and Transmission ID and VIN Location, Derivative and Usage
Description and Operation
Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Component Tests and General Diagnostics
  - Checking Aftermarket Accessories
  - Circuit Testing
- Programming and Relearning
  - Service Programming System (SPS)
  - Control Module References
Locations
- Component Locations
- Connector Locations
- Ground Locations
  - Mater Ground List
  - Grounds By Number
    - G100 - G199
      - G100
      - G101
      - G102
      - G103
      - G104
      - G105
      - G106
    - G300 - G399
- Splice Locations
  - Splices/Splice Packs By Number
  - Master Splice/Splice Pack List
- Harness Locations
Service and Repair
- Procedures
  - Fasteners
  - Thread Inserts
- Removal and Replacement
  - Relay Replacement (Attached to Wire Harness)
  - Relay Replacement (Within an Electrical Center)
Diagrams
- Diagram Information and Instructions
  - Electrical Symbols
  - Truck Zoning
- Diagnostic Aids
- Exploded Views
- Connector Views
- Electrical Diagrams
- Mechanical Diagrams
  - Timing Chain
- Vacuum and Vapor Hose Diagrams
  - Emission Control Systems
    - Emission Hose Routing Diagram
    - Evaporative Emissions Hose Routing Diagram
- Components
- Connectors
- Grounds
  - Mater Ground List
  - Grounds By Number
    - G100 - G199
      - G100
      - G101
      - G102
      - G103
      - G104
      - G105
      - G106
    - G300 - G399
- Splices
  - Splices/Splice Packs By Number
  - Master Splice/Splice Pack List
- Harness
Specifications
- Electrical Specifications
- Mechanical Specifications
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
Technical Service Bulletins
Tools and Equipment
Fundamentals and Basics
Diagnostic Trouble Codes