Does the 2004 cadillac deville have a access panel or do I have to remove the tank to gain acess to fuel pump

Lucky you, you can get to it from the trunk.

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions Section.
2. Relieve the fuel system pressure.
3. Drain the fuel tank.
4. Remove or disconnect the following:
   CAUTION When removing the fuel sender from the tank, the reservoir bucket is full of fuel. Use caution in containing the fuel.
   
   NOTE Note the direction the strainer is pointing.
   
   
   Negative battery cable Spare tire and jack Trunk lining Fuel sender access panel Sender and quick connect fittings from the sender Electrical connector from the sender and position harness and hoses aside
   
   
   Sender retaining ring Sender and take note of its position Fuel sender O-ring and discard it
   
   
   Strainer from the pump by pulling it down and twisting Pump electrical wires and hoses Pump assembly out of the rubber connectors
   

1. Transfer any insulators and grommets from the old pump to the new one.
2. Connect the pump to the fuel hose and tilt the bottom of the pump into the mounting bracket.
3. Install or connect the following:
   
   New strainer on the pump so it points in the same direction as noted during removal Electrical connectors and fuel lines to the pump New O-ring on top of the fuel tank Fuel sender assembly into the tank Lockring Fuel line quick connectors Sender electrical connector Fuel sender access cover Trunk liner Spare tire and jack
   
4. Refill with fuel and check for leaks.