To replace the fuel pump, you'll need to:
* Disconnect the battery's negative terminal. This is crucial for safety.
* Drain the fuel tank. This is also important for safety and to make the job easier.
* Lower the fuel tank. This usually involves disconnecting fuel lines, electrical connectors, and possibly the tank straps.
* Access the fuel pump assembly. This is usually held in place by a retaining ring or clip.
* Replace the fuel pump and associated components (filter, etc.).
* Reassemble everything in reverse order.
Important Safety Considerations:
* Fuel is highly flammable. Work in a well-ventilated area, away from any ignition sources. Never smoke near the fuel tank.
* Fuel vapors can be explosive. Take precautions to avoid sparks.
* Fuel pump pressure is significant. Be careful when disconnecting and connecting fuel lines. Use appropriate clamps and tools.
Recommendation:
This is not a beginner's repair. If you're not comfortable working with fuel systems, take your Astro to a qualified mechanic. Improperly handling fuel can be dangerous.
You might want to consult a repair manual specific to your 1990 Chevy Astro van's year, engine, and trim level for detailed instructions and diagrams. These manuals will provide precise location details and step-by-step guidance. You can find them online or at auto parts stores.
