Here's a general overview. Specifics may vary depending on the engine (e.g., 5.7L, 6.2L, etc.) and whether it's a 2WD or 4WD model. Always consult a repair manual specific to your Suburban's year, engine, and drivetrain for detailed instructions and diagrams. A Haynes or Chilton manual would be invaluable.
Safety First:
1. Disconnect the negative battery terminal. This prevents accidental sparks.
2. Release fuel system pressure. There are several ways to do this, depending on your Suburban. Consult your repair manual for the best method. One common approach involves carefully loosening the fuel cap to allow pressure to bleed off slowly. Another might involve using a pressure release tool on the fuel rail. Never use a quick-release method that could cause fuel spray.
3. Ventilate the area. Work in a well-ventilated area, away from ignition sources. Fuel vapors are dangerous.
4. Wear safety glasses and gloves. Protect yourself from fuel and other potential hazards.
Steps (General Outline – Refer to your repair manual for precise details):
1. Locate the fuel pump. On most 1987 Suburbans, the fuel pump is located inside the fuel tank. This means you'll likely need to drop the fuel tank.
2. Drain the fuel tank. This is crucial to reduce the weight and the risk of fuel spillage. Use a siphon pump or a drain valve if your tank has one.
3. Lower the fuel tank. This usually involves disconnecting the fuel lines, the tank's straps, and possibly the fuel level sender and other components connected to the tank. Support the tank carefully as you lower it. You may need to remove other components for better access – again, your repair manual will guide you.
4. Access the fuel pump. Once the tank is lowered (or partially lowered depending on the design), you'll find the fuel pump assembly. It's typically held in place by a retaining ring or bolts.
5. Disconnect the electrical connector and fuel lines. Be very careful not to damage these components.
6. Remove the fuel pump assembly. This may involve removing the retaining ring and carefully lifting the assembly out of the tank.
7. Install the new fuel pump assembly. Make sure to use new gaskets or seals as needed to prevent leaks.
8. Reconnect the fuel lines and electrical connector. Double-check everything for proper connection and tightness.
9. Raise the fuel tank. Carefully secure the tank back into its position.
10. Reconnect the fuel lines and other components. Ensure everything is properly connected.
11. Reconnect the negative battery terminal.
12. Check for leaks. Inspect all connections for leaks. Start the engine and listen carefully for any unusual sounds or leaks.
Important Considerations:
* Fuel pump sock: The fuel pump often includes a sock or filter. Replace this during the process to prevent future problems.
* Fuel tank straps: Check the condition of your fuel tank straps while the tank is out; replace them if they show any signs of wear or corrosion.
* Tools: You'll need various tools, including sockets, wrenches, screwdrivers, a fuel line disconnect tool (optional but recommended), and possibly a fuel pump installation tool. Your repair manual will detail the specific tools.
This is a simplified overview. Always consult a repair manual specific to your 1987 Suburban before starting this repair. If you're not comfortable performing this repair yourself, take your Suburban to a qualified mechanic. Working with fuel is dangerous, and improper repair could lead to serious consequences.
