Here is the procedure for replacing the fuel pump. To do this you will have to lower the fuel tank in order to access the pump. Here is the procedure:
Fuel Sender Assembly Replacement
J 39765 Fuel Sender Lock Nut Wrench Removal Procedure
Caution: In order to reduce the risk of fire and personal injury that may result from a fuel leak, always replace the fuel sender gasket when reinstalling the fuel sender assembly.
Important: Ensure that the retaining ring is fully seated within the tab slots.
Fuel Tank Replacement Removal Procedure
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the strap bolts to 35 N·m (26 lb ft).
Tighten Tighten the fuel filler hose clamp to 3 N·m (27 lb in).
Tighten Tighten the exhaust shield bolt to 2 N·m(18 lb in).
Tighten Tighten the exhaust shield nuts to 1 N·m(9 lb in).