Repair and Diagnosis
- 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 - 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
- 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
- 5000 MI or 8000 KM
- 10000 MI or 16000 KM
- 15000 MI or 24000 KM
- 20000 MI or 32000 KM
- 25000 MI or 40000 KM
- 30000 MI or 48000 KM
- 35000 MI or 56000 KM
- 40000 MI or 64000 KM
- 45000 MI or 72000 KM
- 50000 MI or 80000 KM
- 55000 MI or 88000 KM
- 60000 MI or 96000 KM
- 65000 MI or 104000 KM
- 70000 MI or 112000 KM
- 75000 MI or 120000 KM
- 80000 MI or 128000 KM
- 85000 MI or 136000 KM
- 90000 MI or 144000 KM
- 95000 MI or 152000 KM
- 100000 MI or 160000 KM
- 105000 MI or 168000 KM
- 110000 MI or 176000 KM
- 115000 MI or 184000 KM
- 120000 MI or 192000 KM
- Severe Service
- 2500 MI or 4000 KM
- 5000 MI or 8000 KM
- 7500 MI or 12000 KM
- 10000 MI or 16000 KM
- 12500 MI or 20000 KM
- 15000 MI or 24000 KM
- 17500 MI or 28000 KM
- 20000 MI or 32000 KM
- 22500 MI or 36000 KM
- 25000 MI or 40000 KM
- 27500 MI or 44000 KM
- 30000 MI or 48000 KM
- 32500 MI or 52000 KM
- 35000 MI or 56000 KM
- 37500 MI or 60000 KM
- 40000 MI or 64000 KM
- 42500 MI or 68000 KM
- 45000 MI or 72000 KM
- 47500 MI or 76000 KM
- 50000 MI or 80000 KM
- 52500 MI or 84000 KM
- 55000 MI or 88000 KM
- 57500 MI or 92000 KM
- 60000 MI or 96000 KM
- 62500 MI or 100000 KM
- 65000 MI or 104000 KM
- 67500 MI or 108000 KM
- 70000 MI or 112000 KM
- 72500 MI or 116000 KM
- 75000 MI or 120000 KM
- 77500 MI or 124000 KM
- 80000 MI or 128000 KM
- 82500 MI or 132000 KM
- 85000 MI or 136000 KM
- 87500 MI or 140000 KM
- 90000 MI or 144000 KM
- 92500 MI or 148000 KM
- 95000 MI or 152000 KM
- 97500 MI or 156000 KM
- 100000 MI or 160000 KM
- 102500 MI or 164000 KM
- 105000 MI or 168000 KM
- 107500 MI or 172000 KM
- 110000 MI or 176000 KM
- 112500 MI or 180000 KM
- 115000 MI or 184000 KM
- 117500 MI or 188000 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
- Water Pump
Description and Operation- Service and Repair
- 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
- Sensors and Switches - Cooling System
- Temperature Warning Lamp/Indicator
- Thermostat
- Water Pump
- Description and Operation
- 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
- Coolant Temperature Sensor/Switch (For Computer)
- Engine Control Module
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Knock Sensor
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Memory Calibration Unit
- Oil Pressure Sensor
- Oxygen Sensor
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Tach Filter
- Throttle Position Sensor
- Vehicle Speed Sensor
- Vehicle Speed Sensor Signal Buffer
- Technical Service Bulletins
- Emission Control Systems
- Fuel Delivery and Air Induction
- Fuel Pressure
- Injection Timing
- Air Cleaner Housing
- Altitude Compensator
- Carburetor
- Diesel MFI Pump
- Fuel
- Fuel Injector
- Fuel Pump
- Fuel Tank
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- Throttle Cable/Linkage
- Throttle Position Sensor
- Turbocharger
- Service and Repair
- Specifications
- Technical Service Bulletins
- Ignition System
- Glow Plug System
- Transmission Control Systems
- PROM - Programmable Read Only Memory
- Application and ID
- Technical Service Bulletins
- Transmission and Drivetrain
- Actuators and Solenoids - Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Actuators and Solenoids - A/T
- Accumulator
- Band Apply Servo
- Case
- Clutch
- Fluid - A/T
- Fluid Pan
- Fluid Pressure Sensor/Switch
- Fluid Pump
- Governor
- Output Shaft
- Output Shaft Bearing/Bushing
- Planetary Gears
- Relays and Modules - A/T
- Sensors and Switches - A/T
- Shift Solenoid
- 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
- Transmission Cooler
- Vacuum Regulator Valve
- Valve Body
- Application and ID
- Description and Operation
Testing and Inspection- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Direct Clutch Plates Burned
- Forward Clutch Plates Burned
- Intermediate Clutch Plates Burned
- Low or High Shift Points
- Moves Forward In Neutral
- No Detent Downshifts
- No Drive In Drive Range
- No Drive In Reverse or Slips In Reverse
- No Engine Braking In Low Range
- No Engine Braking In 2nd Speed
- No Part Throttle Downshifts
- No 2-3 Shift-1ST & 2ND Only
- Noisy Transmission
- Oil Pressure High or Low
- Rough 1-2 Shift
- Rough 2-3 Shift
- Slips In All Ranges & on Starts
- Slips 1-2 Shift
- Slips 2-3 Shift
- Will Not Hold In Park
- 1-2 Shift at Full Throttle Only
- 1st Speed Only No 1-2 Shift
- Component Tests and General Diagnostics
- Service and Repair
- Procedures
- Overhaul
- Disassemble
- Subassembly Service
- Assembling Gear Unit
- Low Roller Clutch
- Reaction Carrier Assembly
- Inspecting Reaction Carrier
- Reaction Carrier Pinion Gear
- Gear Unit & Output Carrier Assemblies
- Output Carrier Assembly/Pinion Gear
- Direct Clutch & Intermediate Roller
- Forward Clutch
- Intermediate Clutch Piston
- Speedo Drive Gear & Speed Sensor
- Governor Assembly
- Oil Pump Assembly
- Assemble
Diagrams- Specifications
- Technical Service Bulletins
- Clutch
- Continuously Variable Transmission/Transaxle
- Differential Assembly
- Differential Carrier
- Carrier Bearings
- Carrier Pinion Shaft
- Description and Operation
- Testing and Inspection
Adjustments- Service and Repair
- Technical Service Bulletins
- Differential Case
- Differential Clutch
- Differential Axle Housing
- Fluid - Differential
- Pinion Bearing
- Pinion Gear
- Application and ID
- Specifications
- Technical Service Bulletins
- Differential Carrier
- Drive Axles, Bearings and Joints
- Drive/Propeller Shafts, Bearings and Joints
- Manual Transmission/Transaxle
- Case
- Counter Gear
- Countershaft
- Extension Housing
- Fluid - M/T
- Mainshaft Bearing/Bushing
- Mainshaft
- Reverse Idler Gear
- Shift Linkage
- Transmission Mount
- Service and Repair
- Diagrams
- Specifications
- Technical Service Bulletins
- Relays and Modules - Transmission and Drivetrain
- Sensors and Switches - Transmission and Drivetrain
- Transmission Control Systems
- Specifications
- Technical Service Bulletins
- Brakes and Traction Control
- 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
- Steering
- Suspension
- Wheels and Tires
- Technical Service Bulletins
- Heating and Air Conditioning
- Air Door
- Blower Motor
- Blower Motor Relay
- Blower Motor Resistor
- Compressor HVAC
- Compressor Clutch
- Compressor Shaft Seal
- Testing and Inspection
- Service and Repair
- Diagrams
- Technical Service Bulletins
- 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
- 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
- Relays and Modules - Cruise Control
- Sensors and Switches - Cruise Control
- Description and Operation
- Testing and Inspection
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Instrument Panel, Gauges and Warning Indicators
- Ammeter Gauge
- Charge Lamp/Indicator
- Clock
- Coolant Level Indicator Lamp
- Dashboard / Instrument Panel
- Dimmer Switch
- Fuel Gauge Sender
- Instrument Cluster / Carrier
- Key Reminder Switch
- Malfunction Indicator Lamp
- Odometer
- Oil Pressure Warning Lamp/Indicator
- Sensors and Switches - Instrument Panel
- Speedometer Head
- Temperature Switch (Warning Indicator)
- Temperature Warning Lamp/Indicator
- Tire Monitoring System
- Transmission Shift Position Indicator Lamp
- Vacuum Gauge/Economy Meter
- Volt Meter Gauge
- Water In Fuel Indicator
- Description and Operation
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Lighting and Horns
- Windows and Glass
- Wiper and Washer Systems
- Application and ID
- Truck Body Identification
- 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
Locations- Additional Information
- Miscellaneous Components
- A/C Compressor Clutch
- Blower Resistors
- Compressor Diode
- Convenience Center
- Fuel Injection Pump
- Fuel Tank Unit
- Fuse Block
- Fuse Link D
- Fuse Link E
- Generator Diode
- Glow Plug Controller
- Glow Plugs
- Heater Water Valve
- Horn Brush/Slip Ring
- Multi-Function Lever
- Programmable Read Only Memory (PROM)
- Radio Capacitor
- Resistance Wire
- Seat Transmission
- Tachometer Filter
- Temperature Lever Valve
- Vacuum Tank
- Vehicle Speed Buffer
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Altitude Advance Switch
- Brake Pressure Switch
- Brake Switch
- Cold Inhibit Switch
- Engine Temperature Switch
- Gear Selector Switch
- Headlamp Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- LH Master Switch Assembly
- Low Vacuum Switch
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Turn/Hazard Switch Assembly
- Diagrams
- Exploded Views
- Electrical Diagrams
- Fluid Diagrams
- Vacuum and Vapor Hose Diagrams
- Components
- Additional Information
- Miscellaneous Components
- A/C Compressor Clutch
- Blower Resistors
- Compressor Diode
- Convenience Center
- Fuel Injection Pump
- Fuel Tank Unit
- Fuse Block
- Fuse Link D
- Fuse Link E
- Generator Diode
- Glow Plug Controller
- Glow Plugs
- Heater Water Valve
- Horn Brush/Slip Ring
- Multi-Function Lever
- Programmable Read Only Memory (PROM)
- Radio Capacitor
- Resistance Wire
- Seat Transmission
- Tachometer Filter
- Temperature Lever Valve
- Vacuum Tank
- Vehicle Speed Buffer
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Altitude Advance Switch
- Brake Pressure Switch
- Brake Switch
- Cold Inhibit Switch
- Engine Temperature Switch
- Gear Selector Switch
- Headlamp Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- LH Master Switch Assembly
- Low Vacuum Switch
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Turn/Hazard Switch Assembly
- Specifications
- Electrical Specifications
- Mechanical Specifications
- Alignment
- Brake Drum
- Brake Master Cylinder
- Brake Rotor/Disc
- Camshaft, Lifters and Push Rods
- Compressor Clutch
- Cylinder Block Assembly
- Drive Belt
- Firing Order
- Oil Pressure Sensor
- Transmission and Drivetrain
- System Specifications
- Band Apply Servo, A/T
- Clutch Slave Cylinder
- Differential Assembly
- Fluid Pump, A/T
- Manual Transmission/Transaxle
- Universal Joint, Drive/Propeller Shaft
- Valve Clearance
- Valve, Intake/Exhaust
- Wheel Cylinder
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes