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 MANUALSCHEVROLET1990STEP VAN 5.7 K, AUTOMATIC, 3L80/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORSOLENOIDS & SOLENOID VALVES
1990 Chevrolet Step Van 5.7 K, Automatic, 3L80/M40
Solenoids & Solenoid Valves
1990 Chevrolet Step Van 5.7 K, Automatic, 3L80/M40SECTION Solenoids & Solenoid Valves
SOLENOIDS & SOLENOID VALVES LOCATION
| Component | Location | |
|---|---|---|
| Canister Purge Solenoid Valve | On vapor canister, or in vapor hose. | |
| Cold Advance Solenoid (Diesel) | On injection pump. | |
| Electrical Sir Control (EAC) Solenoid | ||
| 4.3L (V8) | Behind air pump, on right front of engine. See Figure. | |
| 4.3L (V6) | Behind air pump, on right rear of engine. See Figure. | |
| 5.0L & 5.7L (V8) - 1989 | Behind air pump, on right front of engine. See Figure. | |
| 5.0L & 5.7L (V6) - 1989 | Behind air pump, on right rear of engine. See Figure. | |
| 5.0L & 5.7L (V8) - 1990 | Behind air pump, on right front of engine. See Figure. | |
| 5.0L & 5.7L (V6) - 1990 | Behind air pump, on right rear of engine. See Figure. | |
| 7.4L (V8) - 1989 | Behind air pump, on right front of engine. See Figure. | |
| 7.4L (V6) - 1990 | Behind air pump, on right rear of engine. See Figure. | |
| EGR Dump Solenoid (Diesel) | On top left rear of engine. See Figure. | |
| EGR/EPR Solenoids (Diesel) | On top left rear of engine. See Figure. | |
| EGR Vacuum Solenoid (Gas) | ||
| 4.3L | At right top of engine. See Figure. | |
| 5.0L & 5.7L - 1989 | At right top of engine. See Figure. | |
| 5.0L & 5.7L - 1990 | At right top of engine. See Figure. | |
| 7.4L - 1989 | At right top of engine. See Figure. | |
| 7.4L - 1990 | At right top of engine. See Figure. | |
| Fast Idle Solenoid (Diesel) | On injection pump. | |
| Fuel Shutoff Solenoid (Diesel) | At top center of engine, near intake plenum. | |
| Torque Conv. Clutch (TCC) Solenoid | ||
| 5.0L & 5.7L | In automatic transmission. See Figure. | |
| 7.4L - 1989 | In automatic transmission. See Figure. | |
| 7.4L - 1990 | In automatic transmission. See Figure. | |
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.