checkin the transmission fluid on 1998 Cadillac Catera

i need to check my transmission fluid level does the car need to be running or turned off to check it?

Asked by for the 1998 Cadillac Catera
1 answer
There is no stick. It is a sealed unit and I have been told that only a Caddy dealer can service it. I was told in the past that it cost $400 to service but later the same person said $200. My radiator went out on my move to my new location and I liked driving it so much I got a 2001 a few months a go.