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 - Cruise Control
- Relays and Modules - HVAC
- Relays and Modules - Powertrain Management
- Relays and Modules - Steering and Suspension
- Relays and Modules - Transmission and Drivetrain
- Relays and Modules - Windows and Glass
- Relays and Modules - Wiper and Washer Systems
- Sensors and Switches
- 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 - Starting and Charging
- 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
- 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
- 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 Control Valve
- Heater Core
- Lamps and Indicators - Cooling System
- Radiator
- Radiator Cap
- Radiator Hose
- Sensors and Switches - Cooling System
- Temperature Gauge
- Temperature Warning Lamp/Indicator
- Thermostat
- Water Pump
- 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
- Engine Control Module
- Ignition Hall Effect Sensor
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Idle/Throttle Speed Control Unit
- Knock Sensor
- 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
- Tach Filter
- Throttle Position Sensor
- Transmission Position Sensor/Switch
- Vehicle Speed Sensor
- Vehicle Speed Sensor Signal Buffer
- Application and ID
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
- Sensors and Switches - Emission Control Systems
- Thermostatic Air Cleaner
- Vacuum Restrictor
- 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
- Fuel
- Fuel Filter
- Fuel Injector
- Fuel Pump
- Fuel Return Line
- Fuel Supply Line
- Fuel Tank
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Idle/Throttle Speed Control Unit
- Intake Manifold Vacuum Damper
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- 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
- Knock Sensor
- Pick-Up Coil
- Relays and Modules - Ignition System
- Sensors and Switches - Ignition System
- Spark Plug
- Tach Filter
- Thermal Vacuum Valve
- Transmission Controlled Spark System
- Vacuum Advance Control Solenoid
- Vacuum Restrictor
- 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
- Band Apply Servo
- Bell Housing
- Case
- Clutch
- Extension Housing
- Fluid - A/T
- Fluid Pan
- Fluid Pump
- Governor
- Output Shaft
- Output Shaft Bearing/Bushing
- Overdrive Assembly
- Parking Pawl
- Planetary Gears
- Relays and Modules - A/T
- Seals and Gaskets
- Sensors and Switches - A/T
- Shifter A/T
- Shift Linkage
- Shift Modulator
- Sun Gear
- Throttle Valve Cable/Linkage
- Thrust Washer/Bearing
- Torque Converter
- Torque Converter Clutch
- Torque Converter Clutch Relay
- Torque Converter Clutch Solenoid
- Transmission Cooler
- Transmission Mount
- Transmission Position Sensor/Switch
- Turbine Shaft
- Valve Body
- Application and ID
- Description and Operation
- Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Burned Direct Clutch Plates
- Burned Forward Clutch Plates
- Burned Intermediate Band
- Burned Intermediate Clutch Plates
- Completely Stripped Governor Nylon Gear
- First Speed Only, No 1-2 Shift
- Governor Gear Stripped on One Side
- Harsh 1-2 Shift
- Locks In Reverse From Park to Reverse Only
- Locks Up In Manual Low (Usually Hot Only)
- Locks Up In Reverse (Usually Hot Only)
- Low or High Shift Points
- Manual Low No Drive
- Moves Forward In Neutral
- No Cold Reverse Drive Until Engine Warms Up
- No Drive In Drive Range
- No Drive In Reverse or Slips In Reverse
- No Engine Braking In 1ST Speed
- No Engine Braking In 2nd Speed
- No First Speed, Starts In Second
- No Forward or Reverse Operation
- No Part Throttle Downshifts
- Oil Pressure High or Low
- Rough 1-2 Shift
- Rough 2-3 Shift
- Second Gear Starts or Slips Second Only
- Shift Cold But Not Warm
- Shifted Manually Thru All Ranges
- Slips In All Ranges
- Slips 1-2 Shift
- Slips 2-3 Shift
- Slow Reverse Cold
- Slow Reverse Hot
- Will Not Hold In Park
- 1-2 Shift at Full Throttle Only
- 1ST & 2ND Only, No 2-3 Shift
- Component Tests and General Diagnostics
- Service and Repair
- Procedures
- Case Electrical Connector, Removal
- Detent/T.V. Cable Adjust
- Extension Housing Oil Seal Replace
- Governor Replace
- Intermediate Band Replace
- Manual Shaft, Range Selector Inner Lever & Parking Linkage
- Manual Shift Linkage Adjust - Column Shift
- Manual Shift Linkage Adjust - Console Shift
- Steering Column Lock Back Drive Adjust
- Vacuum Modulator & Modulator Valve Replace
- Valve Body Replace
- 350, 350C - Intermediate Clutch Accumulator Piston Assembly
- Removal and Replacement
- Overhaul
- Procedures
- 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
- Relays and Modules - Transmission and Drivetrain
- 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
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- Service Precautions
- Testing and Inspection
- Diagrams
- Specifications
- Technical Service Bulletins
- Power and Ground Distribution
- Steering and Suspension
- Alignment
- Relays and Modules - Steering and Suspension
- Steering
- Front Steering Knuckle
- Power Steering
- Steering Column
- Steering Gear
- Steering Wheel
- Service and Repair
- Technical Service Bulletins
- Suspension
- Wheels and Tires
- Testing and Inspection
- Technical Service Bulletins
- Heating and Air Conditioning
- Air Conditioning Switch
- Air Door
- Blower Motor
- Blower Motor Relay
- Blower Motor Resistor
- Compressor HVAC
- Compressor Clutch Diode HVAC
- Evaporator Core
- Heater Control Valve
- Heater Core
- Hose/Line HVAC
- Receiver Dryer
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Vacuum Reservoir HVAC
- Service Precautions
- Testing and Inspection
- 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)
- Clutch Switch
- Cruise Control Module
- Cruise Control Servo
- Cruise Control Servo Cable
- Cruise Control Switch
- Cruise Control Vacuum Solenoid
- Relays and Modules - Cruise Control
- Sensors and Switches - Cruise Control
- Vacuum Pump
- Vehicle Speed Sensor/Transducer - Cruise Control
- Description and Operation
- Testing and Inspection
- Service and Repair
- Diagrams
- Instrument Panel, Gauges and Warning Indicators
- Ammeter Gauge
- Audible Warning Device
- Brake Warning Indicator
- Charge Lamp/Indicator
- Clock
- 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 Lamp
- Seat Belt Reminder Lamp
- Sensors and Switches - Instrument Panel
- Speedometer Cable
- Speedometer Head
- Tachometer
- 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
- 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
- A/C Compressor Clutch
- Blower Resistors
- Choke Heater
- Compressor Diode
- Convenience Center
- EFE Heater
- Electronic Spark Timing (EST) Distributor
- Engine Oil Pressure Sender
- Fuel Tank Unit
- Fuse Block
- Fuse Link A
- Fuse Link B
- Generator Diode
- Heater Water Valve
- Horn Brush/Slip Ring
- Idle Speed Control
- Multi-Function Lever
- Programmable Read Only Memory (PROM)
- Radio Capacitor
- Resistance Wire
- Seat Transmission
- Starter
- Tachometer Filter
- Temperature Lever Valve
- Vacuum Tank
- Vehicle Speed Buffer
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Altitude Advance Switch
- Brake Pressure Switch
- Brake Switch
- Engine Oil Pressure Sender/Switch
- Engine Oil Pressure Switch
- Gear Selector Switch
- Headlamp Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- LH Master Switch Assembly
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Turn/Hazard Switch Assembly
- Diagrams
- Diagnostic Aids
- Exploded Views
- Connector Views
- Electrical Diagrams
- Antenna
- Brake Warning Indicator
- Cruise Control
- Heated Glass Element
- Heating and Air Conditioning
- Instrument Panel, Gauges and Warning Indicators
- Lighting and Horns
- Oil Pressure Gauge
- Oil Pressure Warning Lamp/Indicator
- Power Locks
- Powertrain Management
- Radio, Stereo, and Compact Disc
- Seats
- Starting and Charging
- Sunroof / Moonroof
- Temperature Gauge
- Temperature Warning Lamp/Indicator, Engine Cooling
- Transmission and Drivetrain
- Trunk / Liftgate
- Windows
- Wiper and Washer Systems
- Vacuum and Vapor Hose Diagrams
- Components
- Additional Information
- Miscellaneous Components
- A/C Compressor Clutch
- Blower Resistors
- Choke Heater
- Compressor Diode
- Convenience Center
- EFE Heater
- Electronic Spark Timing (EST) Distributor
- Engine Oil Pressure Sender
- Fuel Tank Unit
- Fuse Block
- Fuse Link A
- Fuse Link B
- Generator Diode
- Heater Water Valve
- Horn Brush/Slip Ring
- Idle Speed Control
- Multi-Function Lever
- Programmable Read Only Memory (PROM)
- Radio Capacitor
- Resistance Wire
- Seat Transmission
- Starter
- Tachometer Filter
- Temperature Lever Valve
- Vacuum Tank
- Vehicle Speed Buffer
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Altitude Advance Switch
- Brake Pressure Switch
- Brake Switch
- Engine Oil Pressure Sender/Switch
- Engine Oil Pressure Switch
- Gear Selector Switch
- Headlamp Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- LH Master Switch Assembly
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Turn/Hazard Switch Assembly
- Specifications
- Electrical Specifications
- Air Temperature Sensor ( Ambient / Intake )
- Alternator
- Barometric Pressure Sensor
- Battery
- Coolant Temperature Sensor/Switch (For Computer)
- Idle/Throttle Speed Control Unit
- Ignition Coil
- Ignition Timing
- Manifold Pressure/Vacuum Sensor
- Mixture Control Solenoid
- Pick-Up Coil, Ignition
- Throttle Position Sensor
- Voltage Regulator
- Mechanical Specifications
- Alignment
- Brake Drum
- Brake Master Cylinder
- Brake Rotor/Disc
- Engine
- Firing Order
- Fuel Delivery and Air Induction
- Spark Plug
- Starting and Charging
- Transmission and Drivetrain
- System Specifications
- Automatic Transmission/Transaxle
- Clutch Linkage
- Flex Plate
- Wheel Cylinder
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
- Electrical Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes