Here's a general outline. This is NOT a complete, step-by-step guide, and may not cover all variations. Consult a repair manual specific to your 1997 GMC Suburban with a 454 engine for detailed instructions, diagrams, torque specifications, and safety warnings. A Haynes or Chilton manual is a good investment.
1. Safety First:
* Disconnect the negative battery terminal. This is paramount to prevent sparks and electrical hazards.
* Ventilate the area. Work in a well-ventilated space or outdoors.
* Use appropriate safety glasses and gloves.
2. Preparation:
* Gather necessary tools: Socket set, wrenches, screwdrivers, fuel line disconnect tools, jack stands, jack, fuel pump removal tool (may be necessary), new fuel pump, new fuel filter (recommended), rags or shop towels, safety glasses, gloves.
* Locate the fuel pump: It's usually located within the fuel tank, requiring tank removal or dropping the tank partially.
* Consult your repair manual: This step is CRITICAL. It will show you the exact location, access points, and specific procedures for your vehicle. The process may vary slightly depending on trim level and options.
3. Fuel Tank Access:
* Drain the fuel tank: This is highly recommended to minimize spillage. Use a siphon pump to carefully remove the fuel into a properly labeled and sealed container.
* Lower or remove the fuel tank: This usually involves disconnecting fuel lines, electrical connections, and support straps. You may need to loosen the straps and lower the tank slightly to access the fuel pump assembly. Be extremely careful with fuel lines! Use proper fuel line disconnect tools to avoid damage.
* If your tank requires removal: This is more involved and may require disconnecting exhaust components or other undercarriage parts. Again, consult your repair manual.
4. Fuel Pump Replacement:
* Disconnect electrical connectors: Carefully disconnect the electrical connectors from the fuel pump.
* Remove the fuel pump assembly: This may involve removing a retaining ring or other fasteners. A specialized fuel pump removal tool might be needed to avoid damage.
* Install the new fuel pump assembly: Carefully install the new fuel pump assembly, ensuring it's properly seated and all connections are secure.
* Reconnect electrical connectors: Ensure proper connection.
5. Reassembly:
* Raise and secure the fuel tank: Reinstall the tank, ensuring all connections and straps are secure.
* Reconnect fuel lines: Ensure proper connection, paying close attention to fuel line routing and tightness. Double-check for leaks.
* Reconnect the negative battery terminal:
6. Testing:
* Check for leaks: Carefully inspect all fuel lines and connections for leaks.
* Start the engine: Listen for the fuel pump to prime. The engine should start normally. If not, double-check all connections and consult your repair manual.
* Run the engine for a while: Check for fuel leaks again.
Important Notes:
* Fuel pressure: You may need a fuel pressure gauge to test fuel pressure after installation.
* Fuel system safety: Never work near an open flame or sparks while working on the fuel system.
* Proper disposal: Dispose of old fuel and parts responsibly.
Again, this is a general overview. Improper installation can lead to serious damage or injury. Always consult a repair manual specific to your vehicle before attempting this repair. If you are not comfortable performing this repair, take your Suburban to a qualified mechanic.
