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
- Relays and Modules - Cooling System
- Relays and Modules - Cruise Control
- Relays and Modules - HVAC
- Relays and Modules - Instrument Panel
- Relays and Modules - Lighting and Horns
- Relays and Modules - Powertrain Management
- Relays and Modules - Starting and Charging
- Relays and Modules - Steering and Suspension
- Relays and Modules - Windows and Glass
- Sensors and Switches
- Sensors and Switches - Body and Frame
- Sensors and Switches - Brakes and Traction Control
- Sensors and Switches - Cooling System
- Sensors and Switches - Cruise Control
- Sensors and Switches - Engine
- 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
- Sensors and Switches - Steering and Suspension
- Sensors and Switches - Transmission and Drivetrain
- Sensors and Switches - Wiper and Washer Systems
- Maintenance
- Alignment
- Tune-up and Engine Performance Checks
- Drive Belt
- Filters
- Hoses
- Fluids
- Brake Bleeding
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Application and ID
- Service Intervals
- Severe Service Defined
- Routine Service
- Normal Service
- 7500 MI or 12000 KM
- 15000 MI or 24000 KM
- 22500 MI or 36000 KM
- 30000 MI or 48000 KM
- 37500 MI or 60000 KM
- 45000 MI or 72000 KM
- 52500 MI or 84000 KM
- 60000 MI or 96000 KM
- 67500 MI or 108000 KM
- 75000 MI or 120000 KM
- 82500 MI or 132000 KM
- 90000 MI or 144000 KM
- 97500 MI or 156000 KM
- 100000 MI or 160000 KM
- 105000 MI or 168000 KM
- 112500 MI or 180000 KM
- 120000 MI or 192000 KM
- Severe Service
- 3000 MI or 4800 KM
- 6000 MI or 9600 KM
- 9000 MI or 14400 KM
- 12000 MI or 19200 KM
- 15000 MI or 24000 KM
- 18000 MI or 28800 KM
- 21000 MI or 33600 KM
- 24000 MI or 38400 KM
- 27000 MI or 43200 KM
- 30000 MI or 48000 KM
- 33000 MI or 52800 KM
- 36000 MI or 57600 KM
- 39000 MI or 62400 KM
- 42000 MI or 67200 KM
- 45000 MI or 72000 KM
- 48000 MI or 76800 KM
- 51000 MI or 81600 KM
- 54000 MI or 86400 KM
- 57000 MI or 91200 KM
- 60000 MI or 96000 KM
- 63000 MI or 100800 KM
- 66000 MI or 105600 KM
- 69000 MI or 110400 KM
- 72000 MI or 115200 KM
- 75000 MI or 120000 KM
- 78000 MI or 124800 KM
- 81000 MI or 129600 KM
- 84000 MI or 134400 KM
- 87000 MI or 139200 KM
- 90000 MI or 144000 KM
- 93000 MI or 148800 KM
- 96000 MI or 153600 KM
- 99000 MI or 158400 KM
- 102000 MI or 163200 KM
- 105000 MI or 168000 KM
- 108000 MI or 172800 KM
- 111000 MI or 177600 KM
- 114000 MI or 182400 KM
- 117000 MI or 187200 KM
- 120000 MI or 192000 KM
Service and Repair
Specifications
Technical Service Bulletins
- Engine, Cooling and Exhaust
- Engine
- Compression Check
- Camshaft, Lifters and Push Rods
- Cylinder Block Assembly
- Cylinder Head Assembly
- Drive Belts, Mounts, Brackets and Accessories
- Engine Lubrication
- Intake Manifold
- Lamps and Indicators - Engine
- Seals and Gaskets
- Sensors and Switches - Engine
- Timing Components
- Tune-up and Engine Performance Checks
Locations- Service and Repair
- Specifications
- Technical Service Bulletins
- Cooling System
- Coolant
- Coolant Level Indicator Lamp
- Radiator Cooling Fan
- Engine - Coolant Temperature Sensor/Switch
- Heater Control Valve
- Heater Core
- Lamps and Indicators - Cooling System
- Radiator
- Radiator Cap
- Relays and Modules - Cooling System
- Sensors and Switches - Cooling System
- Temperature Gauge
- Temperature Warning Lamp/Indicator
- Thermostat
- Thermostat Housing
- Technical Service Bulletins
- Exhaust System
- Technical Service Bulletins
- Engine
- Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- A/C Signal
- Air Temperature Sensor ( Ambient / Intake )
- Barometric Pressure Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Data Link Connector
- ECM Calibration Resistor
- Engine Control Module
- Idle/Throttle Speed Control Unit
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Memory Calibration Unit
- Mixture Control Solenoid
- Oil Pressure Sensor
- Oxygen Sensor
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
- Vehicle Speed Sensor Signal Buffer
Description and Operation
Testing and Inspection- Initial Inspection and Diagnostic Overview
- Reading and Clearing Diagnostic Trouble Codes
- Symptom Related Diagnostic Procedures
- - A-E Charts & Related Test Procedures
- - Diagnosis By Symptom
- - Driver Complaint/Comments Charts
- - When to Use This Section
- Backfires
- Cuts Out/Misses
- Detonation/Spark Knock/Pings
- Dieseling/Run-On
- Excessive Exhaust Emissions (Odors)
- Hard Start - Cold
- Hard Start - Hot
- Hard Starting
- Hesitation, Sag, Stumble
- Lack of Power/Sluggish/Spongy/Stumble
- No Start - Engine Cranks OK
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle, Stalling
- Stalls After Start - Cold
- Stalls After Start - Hot
- Surges/Chuggles
- Trouble Code Memory Loss
- Won't Idle
- Component Tests and General Diagnostics
- Scan Tool Testing and Procedures
Diagrams- Technical Service Bulletins
Tools and Equipment
- Emission Control Systems
- Air Injection
- Catalytic Converter
- Early Fuel Evaporation ( EFE )
- Evaporative Emissions System
- Exhaust Gas Recirculation
- Positive Crankcase Ventilation
- Thermostatic Air Cleaner
- Application and ID
- Diagrams
- Technical Service Bulletins
- Fuel Delivery and Air Induction
- Fuel Pressure
- Fuel Pressure Release
- Idle Speed
- Air Cleaner Housing
- Altitude Compensator
- Carburetor
- Carburetor Float
- Carburetor Solenoid
- Choke Pull-off
- Choke Unloader
- Metering Rod
- Application and ID
- Description and Operation
Adjustments- Service and Repair
- Specifications
- Technical Service Bulletins
- Dashpot
- Fuel
- Fuel Filter
- Fuel Injector
- Fuel Pump
- Fuel Shut-off Solenoid
- Fuel Tank
- Idle/Throttle Speed Control Unit
- Intake Manifold Vacuum Damper
- Relays and Modules - Fuel Delivery and Air Induction
- Secondary Throttle Valve
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- Throttle Cable/Linkage
- Throttle Position Sensor
- Turbocharger
Service Precautions- Adjustments
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Ignition System
- Firing Order
- Ignition Timing
- Distributor
- Ignition Cable
- Ignition Coil
- Ignition Control Module
- Pick-Up Coil
- Relays and Modules - Ignition System
- Sensors and Switches - Ignition System
- Spark Plug
- Thermal Vacuum Valve
- Transmission Controlled Spark System
- Vacuum Advance Control Solenoid
- Description and Operation
- Technical Service Bulletins
- Transmission Control Systems
- PROM - Programmable Read Only Memory
- Service Precautions
- Application and ID
- Diagrams
- Technical Service Bulletins
- Tools and Equipment
- Transmission and Drivetrain
- Actuators and Solenoids - Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Actuators and Solenoids - A/T
- Accumulator
- Band Apply Servo
- Brake Switch - TCC
- Case
- Clutch
- Drive Chain
- Fluid - A/T
- Fluid Filter - A/T
- Fluid Line/Hose
- Fluid Pan
- Fluid Pressure Sensor/Switch
- Fluid Pump
- Governor
- Input Shaft
- Output Shaft
- Parking Pawl
- Sensors and Switches - A/T
- Shifter A/T
- Shift Linkage
- Sun Gear
- Throttle Valve Cable/Linkage
- Torque Converter
- Torque Converter Clutch
- Torque Converter Clutch Solenoid
- Transmission Cooler
- Transmission Position Sensor/Switch
- Transmission Pressure Test Port
- Turbine Shaft
- Valve Body
- Application and ID
- Description and Operation
- Description
- Power Flow
- Detent Downshift Valves In Second Gear Position
- Drive Range-Overdrive
- Drive Range-1ST Gear
- Drive Range-2ND Gear (Converter Clutch Applied)
- Drive Range-2nd Gear (Converter Clutch Released)
- Drive Range-3RD Gear
- Manual Lo Gear
- Manual Second Gear
- Manual Third Gear
- Neutral-Engine Running
- Park-Engine Running
- Part Throttle 4-3 Modulated Downshift Valves In 3RD Gear
- Reverse Range
- Testing and Inspection
- Service and Repair
- Procedures
- Removal and Replacement
- Overhaul
- Disassemble
- Assemble
- Transmission Case
- Manual Shaft & Parking Pawl
- Reaction Gear Output Shaft
- Reaction Internal Gear
- Roller Clutch & Reaction Carrier
- Lo-Reverse Clutch & Spacer
- Lo & Reverse Clutch Housing
- Reaction Sun Gear & Input Drum
- Input Sun Gear
- Input Carrier Assembly
- Input Gear & Selective Thrust Washer
- Reaction Selective Thrust Washer
- Checking Reaction Unit Endplay
- Direct Clutch Assembly
- Forward Clutch Housing
- Intermediate Band
- Forward & Direct Clutch
- Case Cover, Drive & Driven Sprocket Supports
- Oil Pump
- Drive Link, Sprockets & Sprocket Cover
- Fourth Clutch Assembly
- Overdrive Internal Gear
- Overrun Clutch Assembly
- Overdrive Carrier Assembly
- Governor & Speedometer Drive Gear
- Intermediate Servo Piston
- LO & Reverse Clutch Housing to Case Cup Plug
- Control Valve Assembly
- Pressure Regulator Assembly
- Converter Clutch Valve
- Oil Pan & Torque Converter
- Diagrams
- Diagnostic Aids
- Electrical Diagrams
- Fluid Diagrams
- Specifications
- Technical Service Bulletins
- Clutch
- Continuously Variable Transmission/Transaxle
- Differential Assembly
- Drive Axles, Bearings and Joints
- Drive/Propeller Shafts, Bearings and Joints
- Flex Plate
- Manual Transmission/Transaxle
- Sensors and Switches - Transmission and Drivetrain
- Transfer Case
- Transmission Control Systems
- Diagrams
- Specifications
- Technical Service Bulletins
- Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- Brake Bleeding
- Brake Warning Indicator
- Disc Brake System
- Drum Brake System
- Hydraulic System
- Parking Brake System
- Power Brake Assist
- Sensors and Switches - Brakes and Traction Control
- Service Precautions
- Testing and Inspection
- Service and Repair
- Technical Service Bulletins
- Starting and Charging
- Sensors and Switches - Starting and Charging
- Relays and Modules - Starting and Charging
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- Service Precautions
- Testing and Inspection
- Diagrams
- Technical Service Bulletins
- Power and Ground Distribution
- Steering and Suspension
- Alignment
- Relays and Modules - Steering and Suspension
- Sensors and Switches - Steering and Suspension
- Steering
- Front Steering Knuckle
- Power Steering
- Steering Column
- Steering Gear
- Steering Wheel
- Service Precautions
- Technical Service Bulletins
- Suspension
- Axle Beam
- Ball Joint
- Control Arm
- Front Steering Knuckle
- Relays and Modules - Suspension
- Sensors and Switches - Suspension
- Stabilizer Bar
- Suspension Control ( Automatic - Electronic )
- Suspension Spring ( Coil / Leaf )
- Suspension Strut / Shock Absorber
- Torsion Bar
- Wheel Bearing
- Description and Operation
- Specifications
- Technical Service Bulletins
- Wheels and Tires
- Technical Service Bulletins
- Heating and Air Conditioning
- Accumulator HVAC
- Air Conditioning Switch
- Air Door
- Ambient Temperature Sensor / Switch HVAC
- Blower Motor
- Blower Motor Switch
- Cabin Temperature Sensor / Switch
- Compressor HVAC
- Compressor Clutch
- Compressor Shaft Seal
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Compressor Clutch Diode HVAC
- Control Module HVAC
- Evaporator Core
- Expansion Block/Orifice Tube
- Heater Control Valve
- Heater Core
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Service Precautions
- Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Diagnosis By Symptom
- Symptom Diagnostic Charts
- Chart 1 No Display on ECC Control Head
- Chart 2 Blower Operation
- Chart 3 Hi Blower Only
- Chart 4 Low Blower Only
- Chart 5 No Air From A/C Outlet In A/C Mode
- Chart 6 Compressor Not Engaged
- Chart 7 Compressor Engaged In Economy
- Chart 8 Sensor String Problem
- Chart 9 Insufficient Cooling
- Chart 10 No Recirculate Only
- Chart 11 Insufficient Heat at Temperature Setting of 90 Degree F
- Chart 12 Insufficient Heat at Temp. Setting of 85 Degrees F
- Chart 13 Front Defroster Inoperative
- Chart 14 Rear Defogger Inoperative
- Chart 15 Rear Defogger on Continuously
- Chart 16 Outside Temperature Always Displays Very Low
- Chart 17 Outside Temperature Always Displays Very High
- Component Tests and General Diagnostics
- Functional Test/Check
- Heater Valve Diagnosis
- Leak Testing - Refrigerant System
- Power Module Testing (A/C Clutch & Blower Controller)
- Refrigerant Check - R-12
- Refrigerant System - Testing
- System Diagnostic Charts - Cycling Clutch Orifice Tube (CCOT)
- System Operation Check
- System Performance Test
- System Response Chart
- Adjustments
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Restraints and Safety Systems
- Accessories and Optional Equipment
- Body and Frame
- Cruise Control
- Brake Switch (Cruise Control)
- Cruise Control Module
- Cruise Control Servo
- Cruise Control Servo Cable
- Cruise Control Switch
- Cruise Control Vacuum Solenoid
- Cruise Control Vacuum Vent Solenoid
- Relays and Modules - Cruise Control
- Sensors and Switches - Cruise Control
- Description and Operation
- Testing and Inspection
- Diagrams
- Technical Service Bulletins
- Instrument Panel, Gauges and Warning Indicators
- Ammeter Gauge
- Audible Warning Device
- Audible Warning Device Control Module
- Brake Warning Indicator
- Charge Lamp/Indicator
- Clock
- Coolant Level Indicator Lamp
- Dashboard / Instrument Panel
- Dimmer Switch
- Door Switch
- Driver/Vehicle Information Display
- Fuel Gauge
- Fuel Gauge Sender
- Instrument Cluster / Carrier
- Key Reminder Switch
- Low Fuel Lamp/Indicator
- Maintenance Required Lamp/Indicator
- Malfunction Indicator Lamp
- Oil Level Warning Indicator
- Oil Pressure Warning Lamp/Indicator
- Parking Brake Warning Lamp
- Relays and Modules - Instrument Panel
- Seat Belt Reminder Buzzer
- Sensors and Switches - Instrument Panel
- Speedometer Head
- Temperature Gauge
- Temperature Switch (Warning Indicator)
- Temperature Warning Lamp/Indicator
- Tire Monitoring System
- Transmission Shift Position Indicator Lamp
- Vacuum Gauge/Economy Meter
- Volt Meter Gauge
- Description and Operation
- Testing and Inspection
- Diagrams
- Technical Service Bulletins
- Lighting and Horns
- Ambient Light Sensor
- Backup Lamp
- Brake Lamp
- Brake Light Switch
- Courtesy Lamp
- Dimmer Switch
- Door Switch
- Fog/Driving Lamp
- Hazard Warning Lamps
- Headlamp
- Horn
- Interior Lighting Module
- License Plate Lamp
- Marker Lamp
- Parking Lamp
- Relays and Modules - Lighting and Horns
- Sensors and Switches - Lighting and Horns
- Tail Lamp
- Turn Signals
- Locations
- Diagrams
- Technical Service Bulletins
- Windows and Glass
- Wiper and Washer Systems
- Application and ID
- Regular Production Option (RPO)
- Vehicle Identification Number (VIN)
- Description
- GM Automobile VIN Charts
- GM Light Duty & Multi-Purpose Truck VIN Charts
- 1982 Light Duty Trucks & Multi-Purpose Vehicle
- 1983 Light Duty Trucks & Multi-Purpose Vehicle
- 1984 Light Duty Trucks & Multi-Purpose Vehicle
- 1985 Light Duty Trucks & Multi-Purpose Vehicle
- 1986 Light Duty Trucks & Multi-Purpose Vehicle
- 1987 Light Duty Trucks & Multi-Purpose Vehicle
- 1988 Light Duty Trucks & Multi-Purpose Vehicle
- 1989 Light Duty Trucks & Multi-Purpose Vehicle
- 1990 Light Duty Trucks & Multi-Purpose Vehicles
- 1991 Light Duty Trucks & Multi-Purpose Vehicles
- 1992 Light Duty Trucks & Multi-Purpose Vehicles
- 1993 Light Duty Trucks & Multi-Purpose Vehicles
- 1994 Light Duty Trucks & Multi-Purpose Vehicles
- 1995 Light Duty Trucks & Multi-Purpose Vehicles
- 1996 Light Duty Trucks & Multi-Purpose Vehicles
- GM Medium & Heavy Duty Truck VIN Charts
- 1982 Medium & Heavy Duty Trucks
- 1983 Medium & Heavy Duty Trucks
- 1984 Medium & Heavy Duty Trucks
- 1985 Medium & Heavy Duty Trucks
- 1986 Medium & Heavy Duty Trucks
- 1987 Medium & Heavy Duty Trucks
- 1988 Medium & Heavy Duty Trucks
- 1989 Medium & Heavy Duty Trucks
- 1990 Medium & Heavy Duty Trucks
- 1991 Medium & Heavy Duty Trucks
- 1992 Medium & Heavy Duty Trucks
- 1993 Medium & Heavy Duty Trucks
- 1994 Medium & Heavy Duty Trucks
- 1995 Medium & Heavy Duty Trucks
- 1996 Medium & Heavy Duty Trucks
- Locations
- Additional Information
- Miscellaneous Components
- Automatic Door Lock Controller
- Blocking Diode
- Buffer Amplifier
- CB Transceiver
- Convertible Top Inline Circuit Breaker
- Cruise Controller
- Cruise Servo
- Dimmer Sensitivity Control
- Diode A
- Diode B
- ECC Programmer
- Fiber Optic Light Source
- Fuel Injector No. 1
- Fuel Injector No. 2
- Fuel Pump
- Fuel Tank Unit
- Fuse Block
- Fuse Link E
- Guidematic Amplifier
- Hazard Flasher
- Horn Brush/Slip Ring
- Hydraulic Power Assembly
- Idle Speed Control
- Illuminated Entry Timer
- Inline Fuse
- Low Altitude Diode
- Manual Bypass Valve
- Seat Belt Chime
- Seat Transmission
- Sentinel Control
- Sentinel Photocell
- Splitter
- Theft Deterrent Controller
- Theft Deterrent Diode
- Top Cylinder
- Trunk Lid Pull Down Inline Fuse
- Wiper/Washer Assembly
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Compressor Cut-Off Switch
- Door Handle Switch
- Driver's Seat Switch
- Engage Switch
- Engine Temperature Switch
- Headlight Dimmer Switch
- Ignition Key Warning Switch
- Ignition Switch
- Memory Switch
- Park Brake Switch
- Seat Belt Switch
- Trunk Lid Tamper Switch
- Trunk Release Switch
- Turn/Hazard Switch Assembly
- Washer Fluid Level Switch
- Diagrams
- Diagnostic Aids
- Exploded Views
- Connector Views
- Electrical Diagrams
- Antenna
- Antitheft and Alarm Systems
- Cruise Control
- Heated Glass Element
- Heating and Air Conditioning
- Instrument Panel, Gauges and Warning Indicators
- Lighting and Horns
- Mirrors
- Power Locks
- Powertrain Management
- Radio, Stereo, and Compact Disc
- Seats
- Starting and Charging
- Sunroof / Moonroof
- Suspension Control ( Automatic - Electronic )
- Transmission and Drivetrain
- Trunk / Liftgate
- Windows
- Wiper and Washer Systems
- Mechanical Diagrams
- Fluid Diagrams
- Vacuum and Vapor Hose Diagrams
- Components
- Additional Information
- Miscellaneous Components
- Automatic Door Lock Controller
- Blocking Diode
- Buffer Amplifier
- CB Transceiver
- Convertible Top Inline Circuit Breaker
- Cruise Controller
- Cruise Servo
- Dimmer Sensitivity Control
- Diode A
- Diode B
- ECC Programmer
- Fiber Optic Light Source
- Fuel Injector No. 1
- Fuel Injector No. 2
- Fuel Pump
- Fuel Tank Unit
- Fuse Block
- Fuse Link E
- Guidematic Amplifier
- Hazard Flasher
- Horn Brush/Slip Ring
- Hydraulic Power Assembly
- Idle Speed Control
- Illuminated Entry Timer
- Inline Fuse
- Low Altitude Diode
- Manual Bypass Valve
- Seat Belt Chime
- Seat Transmission
- Sentinel Control
- Sentinel Photocell
- Splitter
- Theft Deterrent Controller
- Theft Deterrent Diode
- Top Cylinder
- Trunk Lid Pull Down Inline Fuse
- Wiper/Washer Assembly
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Compressor Cut-Off Switch
- Door Handle Switch
- Driver's Seat Switch
- Engage Switch
- Engine Temperature Switch
- Headlight Dimmer Switch
- Ignition Key Warning Switch
- Ignition Switch
- Memory Switch
- Park Brake Switch
- Seat Belt Switch
- Trunk Lid Tamper Switch
- Trunk Release Switch
- Turn/Hazard Switch Assembly
- Washer Fluid Level Switch
- Specifications
- Electrical Specifications
- Mechanical Specifications
- Alignment
- Brake Drum
- Brake Master Cylinder
- Brake Rotor/Disc
- Engine
- Exhaust Manifold
- Firing Order
- Fuel Delivery and Air Induction
- Heating and Air Conditioning
- Spark Plug
- Suspension
- Transmission and Drivetrain
- System Specifications
- Automatic Transmission/Transaxle
- Differential Assembly
- Flex Plate
- Wheel Cylinder
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes