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 - Instrument Panel
- Relays and Modules - Lighting and Horns
- Relays and Modules - Powertrain Management
- Relays and Modules - Steering and Suspension
- 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 - Restraints and Safety Systems
- Sensors and Switches - Starting and Charging
- 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
- 105000 MI or 168000 KM
- 112500 MI or 180000 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
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
- Sensors and Switches - Cooling System
- Temperature Gauge
- Temperature Warning Lamp/Indicator
- Thermostat
- Water Pump
- Specifications
- 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
- Air Temperature Sensor ( Ambient / Intake )
- Barometric Pressure Sensor
- Body Control Module
- Coolant Temperature Sensor/Switch (For Computer)
- Data Link Connector
- Electronic Spark Control Module
- Engine Control Module
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Idle Up Control Valve
- Idle/Throttle Speed Control Unit
- Knock Sensor
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Memory Calibration Unit
- Mixture Control Solenoid
- Oil Pressure Sensor
- Output Driver
- 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
Service Precautions
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
- Backfires
- Cuts Out/Misses
- Detonation/Spark Knock/Pings
- Excessive Exhaust Emissions (Odors)
- Excessive Odors - Fuel, Emissions
- Hard to Start
- Hesitation, Sag, Stumble
- High CO and HC at Idle
- High CO at High RPM
- High CO, Low or Normal HC at Idle
- High HC and CO at High RPM
- High HC at High RPM
- High HC, Low or Normal CO at Idle
- Lack of Power/Sluggish/Spongy/Stumble
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle, Stalling
- Stalls at Idle, Deceleration
- Starts, But Stalls
- Surge, Hesitation, Stall on Acceleration
- Surges/Chuggles
- Trouble Code Memory Loss
- - Diagnosis By Symptom - High Energy Ignition (HEI) System
- Component Tests and General Diagnostics
- Scan Tool Testing and Procedures
Adjustments
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
- Description and Operation
- Diagrams
- Technical Service Bulletins
- Fuel Delivery and Air Induction
- Fuel Pressure
- Idle Speed
- Air Cleaner Housing
- Carburetor
- Choke Pull-off
- Choke Relay
- Choke Thermostat/Heater
- Application and ID
- Description and Operation
- Testing and Inspection
- Adjustments
- Rochester E4M Series
- Choke Cover Removal
- Float Level
- Choke Coil Lever
- Choke Rod
- Air Bleed Hole Blocking Procedure
- Front Vacuum Break Adjustment
- Rear Vacuum Break Adjustment
- Air Valve Dashpot Adjustment
- Choke Unloader Adjustment
- Secondary Throttle Valve Lockout Adjustment
- Air Valve Spring Wind-Up
- Idle Load Compensator (ILC)
- Idle Speed Control (ISC)
- Throttle Position Sensor (TPS)
- Idle Air Bleed Valve Adjustment
- Mixture Adjustment A
- Mixture Adjustment B
- Rochester E4M Series
- Service and Repair
- Specifications
- Fuel
- Fuel Injector
- Fuel Pump
- Fuel Tank
- Idle Speed/Throttle Actuator - Electronic
- Idle Speed/Throttle Actuator - Mechanical
- Idle Up Control Valve
- Idle/Altitude Compensator (Non Comp. Controlled)
- Idle/Throttle Speed Control Unit
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Position Sensor
- Turbocharger
- Service Precautions
- Description and Operation
- Adjustments
- Locations
- Diagrams
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Ignition System
- Transmission Control Systems
- PROM - Programmable Read Only Memory
- Service Precautions
- Application and ID
- Diagrams
- Technical Service Bulletins
- Transmission and Drivetrain
- Actuators and Solenoids - Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Actuators and Solenoids - A/T
- Accumulator
- Band Apply Servo
- Bell Housing
- Clutch
- Automatic Transmission Dipstick - Dipstick Tube
- Fluid - A/T
- Fluid Filter - A/T
- Fluid Line/Hose
- Fluid Pan
- Fluid Pump
- Governor
- Lamps and Indicators - A/T
- Output Shaft
- Planetary Gears
- Seals and Gaskets
- Sensors and Switches - A/T
- Shift Indicator - A/T
- Shift Solenoid
- Shift Linkage
- Shift Modulator
- Stator Shaft
- Throttle Valve Cable/Linkage
- Torque Converter
- Torque Converter Clutch
- Transmission Cooler
- Transmission Mount
- Transmission Position Sensor/Switch
- Valve Body
- Application and ID
- Description and Operation
- Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Drive In Neutral Position
- Harsh Park or Neutral to Reverse Engagement
- High or Low Oil Pressure
- High Pitched Whine Noise
- Low or High Shift Points
- No Converter Clutch Apply
- No Converter Clutch Release
- No Drive In Drive Range
- No Engine Braking In Manual LO/1ST Gear
- No Engine Braking In Manual 2ND/2ND Gear
- No Engine Braking In Manual 3RD/3RD Gear
- No Manual 3RD or 2ND
- No Part Throttle Downshifts
- No Part Throttle 4-3 Downshifts
- No Reverse, First Gear Only
- No 1-2 Shift
- No 2-3 Shift
- No 3-4 Shift
- Oil Leak
- Rough Converter Clutch Application
- Rough 1-2 Shift
- Rough 2-3 Shift
- Rough 3-4 Shift
- Slipping 1-2 Shift
- Slipping 2-3 Shift
- Slipping 3-4 Shift
- Will Not Hold In Park
- 1-2 Shift Only at Pull Throttle Only
- Component Tests and General Diagnostics
- Service and Repair
- Procedures
- Removal and Replacement
- Overhaul
- Disassemble
- Subassembly Service & Transaxle Assemble
- Accumulator Assembly
- Center Support
- Control Valve Assembly
- Direct Clutch Assembly
- Forward & Direct Clutch
- Forward Clutch Assembly
- Forward Clutch Shaft Endplay Check
- Fourth Clutch
- Front Carrier Assembly
- Front Internal Gear
- Front Internal Gear to Output Shaft Endplay
- Front Sun Gear
- Governor Assembly
- Intermediate Band
- Intermediate Servo Piston Assembly
- LO & Reverse Clutch Housing
- Manual Shaft & Parking Pawl Components
- Oil Pump Assembly
- Overdrive Carrier
- Overdrive Internal Gear
- Overdrive Unit Endplay Check
- Overrun Clutch & Overdrive Carrier Assembly
- Rear Carrier
- Rear Internal Gear
- Rear Sun Gear & Input Drum
- Roller Clutch and Rear Carrier
- Torque Converter Assembly
- Turbine Shaft
- 3-4 Accumulator
- 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
- Flywheel
- Lamps and Indicators - Transmission and Drivetrain
- 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
- 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
- Power Steering
- Steering Column
- Steering Gear
- Steering Shaft
- Steering Wheel
- Technical Service Bulletins
- Suspension
- Wheels and Tires
- Technical Service Bulletins
- Heating and Air Conditioning
- Accumulator HVAC
- Air Conditioning Switch
- Air Door
- Blower Motor
- Blower Motor Relay
- Blower Motor Resistor
- Blower Motor Switch
- Compressor HVAC
- Compressor Clutch
- Compressor Shaft Seal
- Testing and Inspection
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Compressor Clutch Diode HVAC
- Compressor Clutch Relay
- Condenser HVAC
- Control Assembly
- Evaporator Core
- Expansion Block/Orifice Tube
- Heater Control Valve
- Heater Core
- Heater Core Case
- Hose/Line HVAC
- Housing Assembly HVAC
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Vacuum Harness HVAC
- Vacuum Reservoir HVAC
- Service Precautions
- Description and Operation
- 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
- Cruise Control Vacuum Vent Solenoid
- Relays and Modules - Cruise Control
- Sensors and Switches - Cruise Control
- Vacuum Restrictor
- Description and Operation
- Testing and Inspection
- Adjustments
- Diagrams
- Technical Service Bulletins
- Tools and Equipment
- Instrument Panel, Gauges and Warning Indicators
- Ammeter Gauge
- Brake Warning Indicator
- Charge Lamp/Indicator
- Cigarette Lighter
- Clock
- Coolant Level Indicator Lamp
- Dashboard / Instrument Panel
- Dimmer Switch
- Driver/Vehicle Information Display
- Fuel Gauge
- Fuel Gauge Sender
- Instrument Cluster / Carrier
- Key Reminder Switch
- Low Fuel Lamp/Indicator
- Malfunction Indicator Lamp
- Odometer
- Oil Change Reminder Lamp
- Oil Level Warning Indicator
- Oil Pressure Warning Lamp/Indicator
- Relays and Modules - Instrument Panel
- Sensors and Switches - Instrument Panel
- Shift Indicator - A/T
- Speedometer Head
- Speedometer Module
- 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
- Service and Repair
- Diagrams
- Technical Service Bulletins
- Lighting and Horns
- Backup Lamp
- Brake Lamp
- Brake Light Switch
- Center Mounted Brake Lamp
- Courtesy Lamp
- Daytime Running Lamp
- Dimmer Switch
- Dome Lamp
- Fog/Driving Lamp
- Hazard Warning Lamps
- Headlamp
- Horn
- License Plate Lamp
- Map Light
- Marker Lamp
- Parking Lamp
- Relays and Modules - Lighting and Horns
- Sensors and Switches - Lighting and Horns
- Tail Lamp
- Trunk Lamp
- Turn Signals
- Underhood Lamp
- Vanity Lamp
- 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 Clutch Diode
- A/C Compressor Clutch
- A/C Defrost Vacuum Actuator
- Air Diverter Valve
- Alternator Diode
- BI-Directional Lower Mode Valve Vacuum Actuator
- Blower Resistors
- Choke Heater
- Convenience Center
- Coolant Temperature Sender
- Crankcase Vent Valve
- Cruise Control Servo
- Cruise Control Vacuum Release Valve
- Defogger Control
- Early Fuel Evaporation Valve (EFE)
- Electronic Spark Timing (EST) Distributor
- Engine Wiring Harness
- Fuel Tank Unit
- Fuel Vapor Canister
- Fuel Vapor Canister Valve
- Fuse Panel
- Fusible Link A
- Fusible Link B
- Glove Box Lamp
- Heater Water Valve
- Heater Water Valve Vacuum Actuator
- Horn Brush/Slip Ring
- Idle Load Compensator
- Multi-Function Lever
- Oil Pressure Lead
- Oil Pressure Sender
- Outside Air Valve Vacuum Actuator
- Rear Vacuum Break
- S.E.S. Lamp Driver
- Service Engine Soon Light
- Temperature Lever Valve
- Trunk/Tailgate Window Release
- Turn Signal Flasher
- Vacuum Tank
- Vehicle Speed Buffer
- Water Temperature Lead
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Air Diverter Valve & Air Select Valve Switching Valve
- Air Switching Valve
- Brake Pressure Switch
- Brake Switch
- Coolant Temperature Switch
- Headlight Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Seat Belt Switch
- Transmission Position Switch
- Turn/Hazard Switch
- Turn/Hazard Switch Assembly
- Connector Locations
- Fuse and Fusible Link Locations
- Ground Locations
- Splice Locations
- Component Locations
- Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Exploded Views
- Connector Views
- Electrical Diagrams
- Cell References
- Antenna
- Brake Warning Indicator
- Cruise Control
- Frame
- 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
- Seats
- Starting and Charging
- Sunroof / Moonroof
- Temperature Warning Lamp/Indicator, Engine Cooling
- Transmission and Drivetrain
- Trunk / Liftgate
- Windows
- Wiper and Washer Systems
- Fluid Diagrams
- Vacuum and Vapor Hose Diagrams
- Components
- Additional Information
- Miscellaneous Components
- A/C Clutch Diode
- A/C Compressor Clutch
- A/C Defrost Vacuum Actuator
- Air Diverter Valve
- Alternator Diode
- BI-Directional Lower Mode Valve Vacuum Actuator
- Blower Resistors
- Choke Heater
- Convenience Center
- Coolant Temperature Sender
- Crankcase Vent Valve
- Cruise Control Servo
- Cruise Control Vacuum Release Valve
- Defogger Control
- Early Fuel Evaporation Valve (EFE)
- Electronic Spark Timing (EST) Distributor
- Engine Wiring Harness
- Fuel Tank Unit
- Fuel Vapor Canister
- Fuel Vapor Canister Valve
- Fuse Panel
- Fusible Link A
- Fusible Link B
- Glove Box Lamp
- Heater Water Valve
- Heater Water Valve Vacuum Actuator
- Horn Brush/Slip Ring
- Idle Load Compensator
- Multi-Function Lever
- Oil Pressure Lead
- Oil Pressure Sender
- Outside Air Valve Vacuum Actuator
- Rear Vacuum Break
- S.E.S. Lamp Driver
- Service Engine Soon Light
- Temperature Lever Valve
- Trunk/Tailgate Window Release
- Turn Signal Flasher
- Vacuum Tank
- Vehicle Speed Buffer
- Water Temperature Lead
- Modules
- Motors
- Relays
- Sensors
- Solenoids
- Switches
- Air Diverter Valve & Air Select Valve Switching Valve
- Air Switching Valve
- Brake Pressure Switch
- Brake Switch
- Coolant Temperature Switch
- Headlight Dimmer Switch
- Horn Switch
- Ignition Key Warning Switch
- Ignition Switch
- Oil Pressure Switch
- Park Brake Switch
- Pressure Cycling Switch
- Seat Belt Switch
- Transmission Position Switch
- Turn/Hazard Switch
- Turn/Hazard Switch Assembly
- Connectors
- Fuse and Fusible Links
- Grounds
- Splices
- Specifications
- Electrical Specifications
- Air Temperature Sensor ( Ambient / Intake )
- Alternator
- Barometric Pressure Sensor
- Battery
- Coolant Temperature Sensor/Switch (For Computer)
- Engine Control Module
- Fuel Injector
- 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
- Distributor, Ignition
- Engine
- Exhaust Manifold
- Firing Order
- Fuel Delivery and Air Induction
- Knock Sensor
- Spark Plug
- Starting and Charging
- Transmission and Drivetrain
- System Specifications
- Accumulator, A/T
- Automatic Transmission Dipstick - Dipstick Tube
- Bell Housing, A/T
- Clutch Linkage
- Flex Plate
- Fluid Line/Hose, A/T
- Fluid Pan, A/T
- Fluid Pump, A/T
- Flywheel
- Governor, A/T
- Shift Linkage, A/T
- Shift Solenoid, A/T
- Stator Shaft, A/T
- Throttle Valve Cable/Linkage, A/T
- Torque Converter
- Transmission Mount, A/T
- Valve Body, A/T
- Water Pump
- Wheel Stud / Lug Nut
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
- Electrical Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes