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 - Steering and Suspension
- Relays and Modules - Transmission and Drivetrain
- 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 - Computers and Control Systems
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Manifold Pressure/Vacuum Sensor
- Oil Pressure Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Throttle Position Sensor
- Throttle Position Switch
- Transmission Position Sensor/Switch
- Vacuum Switch
- Vehicle Speed Sensor
- Sensors and Switches - Emission Control Systems
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- 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 - Windows and Glass
- Sensors and Switches - Wiper and Washer Systems
- Maintenance
- Alignment
- Tune-up and Engine Performance Checks
- Timing Belt
- Timing Component Alignment Marks
- Drive Belt
- Filters
- Hoses
- Fluids
- Brake Bleeding
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Towing Information
- 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
- 127500 MI or 204000 KM
- 135000 MI or 216000 KM
- 142500 MI or 228000 KM
- 150000 MI or 240000 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
- 100000 MI or 160000 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
- 123000 MI or 196800 KM
- 126000 MI or 201600 KM
- 129000 MI or 206400 KM
- 132000 MI or 211200 KM
- 135000 MI or 216000 KM
- 138000 MI or 220800 KM
- 141000 MI or 225600 KM
- 144000 MI or 230400 KM
- 147000 MI or 235200 KM
- 150000 MI or 240000 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
- Water Pump
Locations- Service and Repair
- Specifications
- Technical Service Bulletins
- Cooling System
- Coolant
- Coolant Level Indicator Lamp
- Radiator Cooling Fan
- Engine - Coolant Temperature Sensor/Switch
- 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
- Water Pump
- Service and Repair
Diagrams- Specifications
- Technical Service Bulletins
- Exhaust System
- Technical Service Bulletins
- Engine
- Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Computers and Control Systems
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Manifold Pressure/Vacuum Sensor
- Oil Pressure Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Throttle Position Sensor
- Throttle Position Switch
- Transmission Position Sensor/Switch
- Vacuum Switch
- Vehicle Speed Sensor
- Sensors and Switches - Emission Control Systems
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- A/C Signal
- Air Temperature Sensor ( Ambient / Intake )
- Coolant Temperature Sensor/Switch (For Computer)
- Cranking Signal
- Crankshaft Position Sensor
- Data Link Connector
- Engine Control Module
- Idle Speed/Throttle Actuator - Electronic
- Main Relay (Computer/Fuel System)
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Oil Pressure Sensor
- Output Driver
- Oxygen Sensor
- Power Steering Pressure Switch
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Manifold Pressure/Vacuum Sensor
- Oil Pressure Sensor
- Oxygen Sensor
- Power Steering Pressure Switch
- Throttle Position Sensor
- Throttle Position Switch
- Transmission Position Sensor/Switch
- Vacuum Switch
- Vehicle Speed Sensor
- Throttle Position Sensor
- Throttle Position Switch
- Transmission Position Sensor/Switch
- Vacuum Switch
- Vehicle Speed Sensor
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
- Backfires
- Cuts Out/Misses
- Detonation/Spark Knock/Pings
- Engine Cranks, But Will Not Run
- Excessive Exhaust Emissions (Odors)
- Excessive Odors - Fuel, Emissions
- Hard to Start
- Hesitation or Stalls on Acceleration
- Hesitation, Sag, Stumble
- High CO and HC at High RPM
- High CO and HC at Idle
- High CO at High RPM
- High CO, Low or Normal HC at Idle
- High HC at High RPM
- High HC, Low or Normal CO at Idle
- Lack of Power/Sluggish/Spongy/Stumble
- Misses Under Load
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle, Stalling
- Stalls at Idle, Deceleration
- Starts, But Stalls
- Surge, Hesitation, Stall on Acceleration
- Surges at Steady Speed
- Component Tests and General Diagnostics
- Scan Tool Testing and Procedures
Adjustments- Locations
- Diagrams
- Technical Service Bulletins
- Emission Control Systems
- Fuel Delivery and Air Induction
- Fuel Pressure
- Fuel Pressure Release
- Idle Speed
- Air Cleaner Housing
- Cold Start Injector
- Fuel
- Fuel Filter
- Fuel Injector
- Fuel Pressure Regulator
- Fuel Pump
- Fuel Return Line
- Fuel Supply Line
- Fuel Tank
- Fuel Tank Unit
- Idle Speed/Throttle Actuator - Electronic
- Main Relay (Computer/Fuel System)
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Position Sensor
- Throttle Position Switch
- Turbocharger
Service Precautions- Application and ID
- Description and Operation
- Locations
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
Tools and Equipment
- Ignition System
- Transmission Control Systems
- PROM - Programmable Read Only Memory
- Service Precautions
- Application and ID
- Locations
- Diagrams
- Technical Service Bulletins
- Tools and Equipment
- Circuit Tester
- Connector Test Adapter Kit
- Control Module Connector Terminal Remover
- Fuel Line Quick - Connect Separator
- Fuel Pressure Gauge
- High Impedance Multimeter
- IAC System Monitor
- Injector Test Light
- Metri-Pack Terminal Remover
- Scan Tool
- Unpowered Test Light
- Vacuum Pump With Gauge
- Weather Pack Terminal Remover
- Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Band Apply Servo
- Clutch
- Control Module
- Differential
- Fluid - A/T
- Governor
- Output Shaft
- Relays and Modules - A/T
- Sensors and Switches - A/T
- Shift Interlock
- Shift Linkage
- Throttle Valve Cable/Linkage
- Transmission Cooler
- Transmission Mount
- Transmission Position Sensor/Switch
- Valve Body
- Application and ID
- Description and Operation
- Testing and Inspection
- A131L Automatic Transaxle
- Delayed Upshifts & Downshifts
- Drag or Binding on Upshifts
- Fluid Discolored or Smells Burnt
- Harsh Downshift
- Harsh Engagement Into Any Drive Range
- Incorrect Downshift
- Incorrect Shift Lever Position
- No Downshift When Coasting
- No Engine Braking
- No Hold In Park
- No Kickdown
- Slips on Upshifts or Shudders on Takeoffs
- Vehicle Does Not Move In Any Drive Gear
- Vehicle Does Not Move In Any Range
- A240E Automatic Transaxle
- Delayed Upshifts & Downshifts
- Drag or Binding on Upshifts
- Fluid Discolored or Smells Burned
- Harsh Downshift
- Harsh Engagement Into Any Drive Range
- Incorrect Downshift
- Incorrect Shift Lever Position
- No Downshift When Coasting
- No Engine Breaking In 2 or L Range
- No Hold In Park
- No Kickdown
- No Lock-Up In 2ND, 3RD or Overdrive
- Slips on Upshifts or Shudders on Takeoffs
- Vehicle Does Not Move In Any Range
- A131L Automatic Transaxle
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Clutch
- Continuously Variable Transmission/Transaxle
- Differential Assembly
- Drive Axles, Bearings and Joints
- Drive/Propeller Shafts, Bearings and Joints
- Flywheel
- Manual Transmission/Transaxle
- Relays and Modules - Transmission and Drivetrain
- Sensors and Switches - Transmission and Drivetrain
- Transfer Case
- Transmission Control Systems
- Diagrams
- Specifications
- Technical Service Bulletins
- Automatic Transmission/Transaxle
- Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- Brake Bleeding
- Brake Pedal Assy
- 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
- Technical Service Bulletins
- Starting and Charging
- Sensors and Switches - Starting and Charging
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- 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
- Suspension
- Wheels and Tires
- Technical Service Bulletins
- Heating and Air Conditioning
- Air Conditioning Switch
- Blower Motor
- Compressor HVAC
- Compressor Clutch Relay
- Condenser HVAC
- Condenser Fan
- Control Module HVAC
- Coolant Temperature Sensor / Switch HVAC
- Evaporator Case
- Evaporator Core
- Evaporator Temperature Sensor / Switch
- Expansion Block/Orifice Tube
- Expansion Valve
- Heater Core
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Vacuum Check Valve HVAC
- Service Precautions
- Description and Operation
- Testing and Inspection
- Locations
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Restraints and Safety Systems
- Air Bag Systems
- Head Restraint System
- Seat Belt Systems
- Sensors and Switches - Restraints and Safety Systems
- Technical Service Bulletins
- Accessories and Optional Equipment
- Body and Frame
- Bumper
- Doors, Hood and Trunk
- Exterior Moulding / Trim
- Frame
- Interior Moulding / Trim
- Locks
- Mirrors
- Paint, Striping and Decals
- Relays and Modules - Body and Frame
- Roof and Associated Components
- Seats
- Sensors and Switches - Body and Frame
- Weatherstrip
- Technical Service Bulletins
- Cruise Control
- Brake Switch (Cruise Control)
- Clutch Switch
- Cruise Control Module
- Cruise Control Servo
- Cruise Control Servo Cable
- Cruise Control Switch
- Relays and Modules - Cruise Control
- Sensors and Switches - Cruise Control
- Vacuum Pump
- Description and Operation
- Testing and Inspection
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Instrument Panel, Gauges and Warning Indicators
- Audible Warning Device Control Module
- Brake Warning Indicator
- Coolant Level Indicator Lamp
- Dashboard / Instrument Panel
- Dimmer Switch
- Fuel Gauge
- Fuel Gauge Sender
- Instrument Cluster / Carrier
- Key Reminder Switch
- Low Fuel Lamp/Indicator
- Malfunction Indicator Lamp
- Odometer
- Oil Pressure Gauge
- Oil Pressure Warning Lamp/Indicator
- Parking Brake Warning Switch
- Relays and Modules - Instrument Panel
- Seat Belt Reminder Lamp
- Sensors and Switches - Instrument Panel
- Speedometer Head
- Temperature Gauge
- Temperature Warning Lamp/Indicator
- Tire Monitoring System
- Transmission Shift Position Indicator Lamp
- Volt Meter Gauge
- Description and Operation
- Testing and Inspection
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Lighting and Horns
- Backup Lamp
- Brake Lamp
- Brake Light Switch
- Center Mounted Brake Lamp
- Dimmer Switch
- Fog/Driving Lamp
- Hazard Warning Lamps
- Headlamp
- Horn
- License Plate Lamp
- Marker Lamp
- Parking Lamp
- Relays and Modules - Lighting and Horns
- Sensors and Switches - Lighting and Horns
- Tail Lamp
- Turn Signals
- Service and Repair
- 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
- Component Locations
- Additional Information
- Miscellaneous Components
- A/C Amplifier
- A/C Diode
- Blower Resistor
- Cold Start Fuel Injector
- Cold Start Injector Timer
- Crankcase Vent Valve
- Cruise Control Vacuum Pump
- ECM-IG Fuse
- Fuel Gauge Sender
- Fuel Pressure Regulator Valve
- Fuel Vapor Canister
- Fusible Link Box
- Heater Circuit Breaker
- I/P Rheostat
- Idle Air Control Valve
- Idle Up Diode
- Igniter
- Ignition Coil
- Junction Block 1
- Junction Block 2
- Junction Block 3
- Junction Block 4
- Junction Block 5
- Thermistor
- Washer Change Valve
- Modules
- Motors
- Relays
- Sensors
- Switches
- A/C Cut-Out Switch
- A/C Idle-Up Vacuum Switching Valve
- A/C Pressure Switch
- A/C Switch
- Back-Up Lamp Switch
- Back-Up Lamp/Neutral Start Switch
- Brake Warning Switch
- Clutch Switch
- Coolant Fan Temperature Switch
- Cruise Control and Rear Defogger Switch
- Cruise Control Clutch Switch
- Cruise Control Switch
- Cruise Control Vacuum Switch
- Cruise/Stoplamp Switch
- EGR Vacuum Switching Valve (California)
- Ignition Key Warning Switch
- Neutral Start Switch
- Parking Brake Switch
- Power Steering Pressure Switch
- Power Window Master Switch
- Rear Wiper Switch
- Seat Belt Switch
- Stop Lamp Switch
- Sunroof Switch
- Text Description
- Connector Locations
- Fuse and Fusible Link Locations
- Ground Locations
- Splice Locations
- Harness Locations
- Component Locations
- Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Exploded Views
- Connector Views
- Electrical Diagrams
- Cell References
- Brake Warning Indicator
- Cooling System
- Cruise Control
- Heated Glass Element
- Heating and Air Conditioning
- Instrument Panel, Gauges and Warning Indicators
- Lighting and Horns
- Power Locks
- Powertrain Management
- Radio, Stereo, and Compact Disc
- Seat Belt Systems
- Starting and Charging
- Sunroof / Moonroof
- Transmission and Drivetrain
- Windows
- Wiper and Washer Systems
- Fluid Diagrams
- Vacuum and Vapor Hose Diagrams
- Components
- Additional Information
- Miscellaneous Components
- A/C Amplifier
- A/C Diode
- Blower Resistor
- Cold Start Fuel Injector
- Cold Start Injector Timer
- Crankcase Vent Valve
- Cruise Control Vacuum Pump
- ECM-IG Fuse
- Fuel Gauge Sender
- Fuel Pressure Regulator Valve
- Fuel Vapor Canister
- Fusible Link Box
- Heater Circuit Breaker
- I/P Rheostat
- Idle Air Control Valve
- Idle Up Diode
- Igniter
- Ignition Coil
- Junction Block 1
- Junction Block 2
- Junction Block 3
- Junction Block 4
- Junction Block 5
- Thermistor
- Washer Change Valve
- Modules
- Motors
- Relays
- Sensors
- Switches
- A/C Cut-Out Switch
- A/C Idle-Up Vacuum Switching Valve
- A/C Pressure Switch
- A/C Switch
- Back-Up Lamp Switch
- Back-Up Lamp/Neutral Start Switch
- Brake Warning Switch
- Clutch Switch
- Coolant Fan Temperature Switch
- Cruise Control and Rear Defogger Switch
- Cruise Control Clutch Switch
- Cruise Control Switch
- Cruise Control Vacuum Switch
- Cruise/Stoplamp Switch
- EGR Vacuum Switching Valve (California)
- Ignition Key Warning Switch
- Neutral Start Switch
- Parking Brake Switch
- Power Steering Pressure Switch
- Power Window Master Switch
- Rear Wiper Switch
- Seat Belt Switch
- Stop Lamp Switch
- Sunroof Switch
- Text Description
- Connectors
- Fuse and Fusible Links
- Grounds
- Splices
- Harness
- Specifications
- Electrical Specifications
- Mechanical Specifications
- Alignment
- Backup Lamp Switch
- Brake Caliper
- Brake Drum
- Brake Hose/Line
- Brake Master Cylinder
- Brake Rotor/Disc
- Catalytic Converter
- Compressor HVAC
- Distributor, Ignition
- EGR Valve
- Engine
- System Specifications
- Camshaft, Lifters and Push Rods
- Cylinder Block Assembly
- Cylinder Head Assembly
- Drive Belt
- Engine Mount
- Idler Pulley
- Intake Manifold
- Oil Cooler, Engine
- Oil Pan, Engine
- Oil Pressure Sensor
- Oil Pump, Engine
- Timing Belt
- Exhaust System
- Firing Order
- Fuel Delivery and Air Induction
- Pick-Up Coil, Ignition
- Spark Plug
- Steering Gear
- Suspension
- Tie Rod
- Tires
- Transmission and Drivetrain
- Wheel Cylinder
- Wheel Stud / Lug Nut
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes