How do I add transmission fluid to a 2004 Cadillac CTS.

try a new filter and fluid

Edgar: You have no dipstick. Here are the instructions: http://www.carcarekiosk.com/video/2006_Cadillac_CTS_3.6L_V6/transmission_fluid/add_level

https://www.youtube.com/watch?v=UmSU_9ElEzo

My 2009 CTS4 should be the same as your 2008 CTS. There is no dipstick tube to check or fill the transmission. The check plug is in the bottom of the pan. It loos like a drain plug, but it is not. The fill plug is on the passenger side of the transmission, just above the front of the oil pan. It is a plastic and rubber plug that is pulled straight up.

You'll probably be better off having it checked and filled at a dealer or trans shop.

every 60,000 -70,000miles

I will quess that there is a 90% chance, you will have to
pull the transaxle & have it rebuilt

From here forward, you change your trans fluids every three
years ,along with the power steering.That will fail next.

pour the fluid in the tube where the transmission dipstick is located, add only a pint at a time and recheck

Do nothing if everything seems OK. Drain and refill, but never flush, you will stir up gunk in the pan, if you have hard or sluggish shifts

tod34 is correct. The "fill" area of this transmission is located on the transmission itself. It is a fluid leveling plug located low on the main case toward the back of the trans. You must pump the fluid in through that hole. If you are on level ground and the transmission is properly warmed, you should fill the transmission until the fluid level is flush with the bottom of the hole (starts spilling out)

According to the owners manual, unless you see a leak from the transmission, or have unusual driving conditions such as frequent towing, it's not necessary to check the automatic transmission fluid. By the way, if you need an owners manual, you can download a copy in pdf form for free online from several websites. Just do an internet search for 2004 Cadillac CTS owners manual free.

I too have the 2004 CTS.
Just today, my dealership checked my transmission fluid level because I have gear noise.

There is NO dipstick!

The car is put up on the hoist with motor running and transmission in neutral.
There is a fill / level check plug located on drivers side of transmission through which the level is checked.

koram