Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1989G 30 VAN V8-305 5.0LREPAIR AND DIAGNOSISDIAGRAMSCOMPONENTSTEXT DESCRIPTION
1989 Chevrolet G 30 Van V8-305 5.0L
Text Description
1989 Chevrolet G 30 Van V8-305 5.0LSECTION Text Description
Air Cleaner Sensor (Six Cylinder): RH Side Of Air Cleaner
Air Cleaner Sensor (V8): LH Side Of Air Cleaner
AIR Diverter Module: RH Side Of Engine
AIR Diverter Valve (Inline Six Cylinder): LH Side Of Engine
AIR Diverter Valve (V6 &V8): RH Side Of Engine
AIR Pump: RH Side Of Engine
ALDL Diagnostic Connector: Under LH Side Of Instrument Panel
Audio Alarm Module: Behind LH Side Of Instrument Panel, Left Of Steering Column
Back-Up Lamp Switch (Automatic Trans.): At Steering Column Gear Selector
Back-Up Lamp Switch (Manual Trans.): LH Side Of Transmission
Battery Junction Block: At Bulkhead Connector And Seal Assembly
Bulkhead Connector: LH Rear Of Engine Compartment
Clutch Release Switch: Under LH Side Of Instrument Panel, On Pedal Bracket
Clutch Start Switch: Behind LH Side Of Instrument Panel, On Clutch Pedal Support
Coolant Temperature Sensor (TBI): Lower Side Of LH Cylinder Head
Cooling Fan Temperature Switch: In RH Cylinder Head
Cruise Control Module: Under LH Side Of Instrument Panel, On Rear Of Dash
Deceleration Valve: LH Side Of Engine
Door Lock Module: Behind RH Side Of Instrument Panel, At Top Of Cowl Panel
Door Lock Relay: Behind RH Side Of Instrument Panel, At Top Of Cowl Panel
Downshift Relay (TBI): Top Front Of Engine
EFE Valve: LH Side Of Engine
EGR Solenoid (TBI): RH Side Of Engine
EGR Valve: Top Of Engine
Electric Air Control Solenoid: RH Side Of Engine
Electronic Control Module: Under LH Seat
Electronic Delay Module Assembly: Behind LH Side Of Instrument Panel
Engine Heater: LH Side Of Engine
Engine Temperature Switch: LH Side Of Engine
ESC Knock Sensor: RH Side Of Engine
ESC Module: LH Side Of Seat, Near Riser
Evaporator Pressure Control Switch: On A/C Evaporator
Flow Switch: At Power Steering Pump
Front Door Lamp (Less Lamp Group): On Head Lining Near Front Center Of Vehicle
Fuel Filter (Inline): RH Frame Side Member
Fuel Injectors: Top Center Of Engine In Throttle Body
Fuel Module: Under LH Seat, Near Riser
Fuel Pump Prime Connector: Top Of Engine
Fuel Pump Relay: Center Front Of Dash Panel
Fuel Pump Test Connector: Front Of Engine Compartment
Fuel Vapor Canister: RH Front Of Engine Compartment
Fuse Panel: Under LH Side Of Instrument Panel
Fusible Link D: At Battery Junction Block
Fusible Link E: At Battery Junction Block
Fusible Link F: At Battery Junction Block
Fusible Link H: At Battery Junction Block
Hazard Flasher: Behind LH Side Of Instrument Panel
Headlamp Dimmer Switch: Part Of Multi-Function Switch
High Pressure Cutout Switch: On Compressor Assembly
Horn Relay: Under LH Side Of Instrument Panel
Hydro Boost Pressure Warning Switch: RH Rear Of Brake Master Cylinder Inlet Hose
Idle Air Control Actuator: RH Top Of Engine
Knock Sensor (V6): LH Side Of Engine
Knock Sensor (V8): RH Side Of Engine
LH Door Jamb Switch (Less Lamp Group): At LH A-Pillar
MAP Sensor: Top RH Side Of Engine
MAP Sensor: RH Side Of Engine
MAP Sensor (TBI): Top RH Side Of Engine
MAP Sensor: RH Center Of Engine
Neutral Switch (Manual Trans.): Under LH Side Of Instrument Panel
Oil Pressure Sender: LH Rear Of Engine
Oil Pressure Switch: LH Rear Of Engine
Oil Pressure/Fuel Pressure Switch (TBI): Rear Of Engine
Oxygen Sensor: RH Rear Of Engine
Oxygen Sensor: LH Rear Of Exhaust Manifold
Pulse Wiper Control Module: RH Side Of Steering Column
RH Door Jamb Switch (Less Lamp Group): At RH A-Pillar
Starter/Solenoid Assembly: Lower RH Side Of Engine
TCC Brake Switch: Below LH Side Of Instrument Panel, On Brake Pedal Support Arm
Temperature Switch (TBI): LH Side Of Engine
Throttle Position Sensor: On Throttle Body
Throttle Return Valve: LH Side Of Engine
Throttle Valve Relay: LH Front Of Engine
Transmission Converter Clutch Connector: RH Rear Of Engine, Near Transmission
Transmission Downshift Relay: Center Front Of Dash Panel
Transmission Solenoid: LH Side Of Transmission
Transmission Switch: LH Side Of Transmission
Transmission Torque Converter Clutch Solenoid: LH Side Of Transmission
Turn Flasher: Behind LH Side Of Instrument Panel, Near Hood Release Cable
Turn Signal Switch: Top Of Steering Column, Below Steering Column
Vacuum Release Valve: Under LH Side Of Instrument Panel, On Brake Pedal Bracket
Vehicle Speed Sensor: Under LH Side Of Instrument Panel
Vehicle Speed Sensor Buffer: Taped To Instrument Panel Harness, Behind Instrument Panel Cluster
Water Temperature Sensor: LH Side Of Engine
Water Temperature Switch: LH Side Of Engine
Windshield Washer Pump: RH Front Of Dash Panel
Windshield Wiper Motor: LH Rear Of Engine Compartment
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.