Pry bar and a hammer
The fuel door release latch, on your Cadillac DTS, is located on the floor near the drivers seat. Pull the lever up and the fuel door will open.
The fuse panel in a 1999 Cadillac Deville is on the driver side dash panel. You will have to open the car door to access the panel.
Open the door with your key. Now pull the hood latch to open the hood.
You need a user manual to open a jammed adhtray in a 1993 cadillac deville.
Door trim must be removed. A piece of disconnected linkage is most likely the culprit
probably the fuse or relay on the fuse block is bad , find and replace the fuse or relay and trunk and fuel door should there may be two separate fuses ,
There is a pull pin release in the trunk
I have a 2000 cadillac catera sometimes the radio will shut off when this occurs the fuel door will not open neither will the trunk
Use your finger to apply pressure to the left side of the fuel door on the cars passenger side. That will cause the fuel door to spring open.
Inside the glove box there is a button you push. I think you got to have the ignition on for it to operate.
The one on top is to open the trunk. The one on the bottom is to open the fuel door.