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.
1985 Chevrolet Forward Control 6.2 J, StandardFACTORY OEM SERVICE PROCEDURE
Sending Units/Sensor
SENDING UNITS/SENSOR LOCATION
| Component | Location |
|---|---|
| Coolant Sensor | On front of engine. |
| Detonation Sensor | On lower left side of engine block behind starter. |
| Fuel Gauge Sending Unit | On top of fuel tank. |
| Oil Pressure Sensor (4.1L) | On engine above starter. |
| Oil Pressure Sensor (5.0 & 5.7L) | Behind distributor. |
| Oil Pressure Sensor (6.2L) | Or upper front of engine. |
| Oxygen Sensor (6-Cyl.) | In front exhaust pipe. See Figure. |
| Oxygen Sensor (V8) | Or exhaust manifold. See Figure. |
| Throttle Position Sensor | On carburetor. See Figure. |
| Vacuum Sensor | On firewall. See Figure. |
| Vehicle Speed Sensor | Under left side of dash. |
Factory Service Tools
Use the Manual With the Right Hardware
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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.