Transmission Fluid Refill

Tiny
JSAENZ25
  • 2005 CADILLAC CTS
  • 6 CYL
  • 2WD
  • 91,000 MILES

How do I refill the transmission fluid in a 2005 CTS?

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Saturday, February 12th, 2011 AT 12:55 AM

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Tiny
2CARPROS KEN
  • ADMIN
  • 11,727 POSTS

You will need to raise the car safely to get started. Here is a guide that will help

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

There is two plugs on the drivers side of the transmission that must be removed to check the fluid level and add fluid.

Here is a guide that we show you how to service the unit,

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here are the book instructions with diagrams (below)

There is a fill plug on the side of the trans, at the left rear side. Here is the checking/filling procedure.

AUTOMATIC TRANSMISSION FLUID LEVEL CHECKING PROCEDURE

NOTE: It is not necessary to check the transmission fluid level. A transmission fluid leak is the only reason for fluid loss. If a leak occurs have it repaired as soon as possible.

Start the engine and allow the engine to idle until the transmission fluid normal operating temperature has been reached.
Depress the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the PARK range.
Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range.
CAUTION: The engine must be running when the transmission fluid fill plug is removed, or excessive fluid loss will occur. Transmission fluid may be hot. Since the actual fluid level is unknown, stand clear when removing the fill plug. Have a container ready to capture any lost fluid. Do not turn the engine off with the fill plug removed, as you can be injured by hot transmission fluid being expelled out of the oil fill opening.

Remove the transmission plug (36).
IMPORTANT: The transmission fluid may darken with normal use and does not always indicate contamination or oxidation.

Check the fluid level. The fluid level should be even with the bottom of the threaded plug hole.
Add DEXRON III automatic transmission fluid in increments of 0.5 liters until the fluid drains from the plug hole.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

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Saturday, September 30th, 2017 AT 8:43 PM

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