Safety First:
* Disconnect the battery negative terminal. This prevents accidental sparks.
* Ventilate the area well. Gasoline fumes are highly flammable and dangerous.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
* Use proper jack stands. Never work under a vehicle supported only by a jack.
* Consider depressurizing the fuel system. This involves relieving pressure in the fuel lines, which varies depending on the fuel injection system. Your repair manual will provide instructions.
General Steps (Consult your repair manual for specifics):
1. Preparation: Raise the Jimmy securely on jack stands. Locate the gas tank, fuel lines, filler neck, and vent lines. You may need to remove parts to access the tank, such as the spare tire, exhaust components, or body panels. The specific components will vary depending on trim level and options.
2. Disconnect Fuel Lines: This is crucial and potentially dangerous. You'll need to carefully disconnect the fuel supply line, the fuel return line, and the vent line. Use appropriately sized wrenches and be ready to deal with any residual fuel in the lines. Consider using fuel line clamps to secure lines after disconnecting. You may need specialized tools or clamps to disconnect fuel quick-connect fittings. Again, consult your repair manual for precise instructions and the proper tool to use.
3. Disconnect Electrical Connections: There might be a fuel level sensor or other electrical components connected to the tank. Disconnect these carefully.
4. Remove the Filler Neck: This usually involves disconnecting clamps or bolts.
5. Remove the Gas Tank Straps/Supports: The tank is held in place by straps or brackets. These will need to be carefully removed. You may need to loosen or remove bolts.
6. Lower the Gas Tank: Slowly lower the tank. It will likely be heavy and contains some residual fuel. You may need assistance to support it as you disconnect the last of the components.
7. Inspect the Tank and Surrounding Area: Look for any potential issues, such as rust or damage, that may have contributed to the need for removal.
Reinstallation: Reverse the removal process, ensuring all connections are secure and tight. Check for fuel leaks after reinstallation before starting the engine.
Important Considerations:
* Repair Manual: A repair manual specific to your 1997 GMC Jimmy is essential. It provides detailed diagrams and instructions, making the process safer and easier.
* Professional Help: If you're not comfortable performing this task, consider taking your Jimmy to a qualified mechanic. Working with fuel systems can be dangerous if not done correctly.
This information is for guidance only. Improperly handling fuel can result in serious injury or death. Always prioritize safety and consult your vehicle's repair manual before attempting any repairs.
