I. Safety First:
* Disconnect the negative battery terminal before starting any work.
* Work in a well-ventilated area. Fuel fumes are highly flammable. Avoid sparks or open flames.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
* Use jack stands to support the vehicle securely if you're working underneath. Never rely solely on a jack.
II. Tools and Materials:
* Jack and jack stands (if necessary, depending on access)
* Socket wrench set (metric)
* Torque wrench
* Fuel line disconnect tool (highly recommended)
* New fuel pump (ensure it's the correct one for your vehicle's engine)
* Fuel pump gasket(s) (often included with the new pump)
* Shop rags or absorbent towels
* Safety glasses and gloves
* Container for collecting fuel (appropriate for gasoline)
* Possibly a fuel pressure gauge (to check pressure after replacement)
III. Procedure (General Steps – Consult a Repair Manual):
This procedure is general; always consult a repair manual specific to your 1997 GMC Safari for detailed instructions and torque specifications. The location and access to the fuel pump may vary slightly depending on the engine and trim level.
1. Locate the Fuel Pump: This is usually located inside the fuel tank. Access is typically gained through a panel in the cargo area (under the vehicle's floor) or sometimes under the backseat. Your repair manual will show the exact location.
2. Drain Fuel from the Tank: This step reduces the risk of fuel spillage. Siphon some of the fuel out using a siphon pump. You don't need to completely empty the tank, but lowering the fuel level significantly helps.
3. Remove Fuel Pump Access Panel: This usually involves removing bolts or screws.
4. Disconnect Electrical Connectors: Carefully disconnect the electrical connectors to the fuel pump. Take pictures or make notes to remember how they connect.
5. Disconnect Fuel Lines: This is where the fuel line disconnect tool comes in handy. Use extreme caution to avoid fuel spillage. Have your absorbent material ready to soak up any drips. Use the disconnect tool to properly release the lines; avoid using excessive force.
6. Remove Fuel Pump Assembly: The fuel pump assembly is usually held in place by a retaining ring or bolts. Carefully remove it. The entire assembly (pump, sender unit, etc.) usually comes out as one piece.
7. Install New Fuel Pump Assembly: Carefully install the new fuel pump assembly, paying attention to the orientation and ensuring the gasket is correctly seated.
8. Reconnect Fuel Lines and Electrical Connectors: Reconnect the fuel lines and electrical connectors, making sure everything is securely fastened. Double-check your connections.
9. Reinstall Access Panel: Carefully reinstall the fuel pump access panel.
10. Reconnect Negative Battery Terminal: Connect the negative battery terminal back to the battery.
11. Check for Leaks: Start the vehicle and check for fuel leaks around the fuel pump area. If leaks are detected, immediately turn off the vehicle and investigate.
12. Test Drive: Once you're sure there are no leaks, take the vehicle for a test drive to ensure the fuel pump is functioning correctly.
IV. Important Notes:
* Repair Manual: A repair manual specific to your 1997 GMC Safari is essential. It will provide detailed instructions, diagrams, torque specifications, and crucial safety information.
* Professional Help: If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Incorrectly installing the fuel pump can lead to serious damage or injury.
* Fuel Pressure: After installation, consider having a professional check the fuel pressure to ensure it's within the manufacturer's specifications.
This information is for guidance only. Always prioritize safety and consult your vehicle's repair manual before attempting this repair. Improper repair could result in injury or damage.
