1993 Cadillac Deville

Hi:
The filter is internal. To remove and replace it, you need to remove the trans pan. Be careful when you do this or you will take a bath in ATF. Remove the pan slowly allowing one side of the pan to open sooner than the other so you can direct the old fluid in one direction. Once removed, pop the old filter off, replace it, clean old gasket material from the pan and trans housing, replace pan and new gasket, and refill trans through the trans dipstick tube.

Let me know if you have any other questions.

Joe