Auto trans cooler pipes nut size

[JaceSVZ]

Hi all, replacing the radiator in an SVZ wagon and am just after the nut size for the nuts that secure the trans cooler pipes to the radiator? They look to be maybe 17mm or 19mm
Cheers!

 

[Fu Manchu]

The pipes are connected with GM quick connect fittings. Get the release tool.

The “nuts” that are in the radiator and you’ll be able to find a socket to fit them once the hose is released. You’ll grab one socket and decided if it fit or not. If not, grab another size socket. Of note there is also a small green o-ring that seals the fitting in the radiator if you are re-using the fitting.

You will need to catch as much oil as possible. That gives you an idea of how much to replace. Then check the auto trans oil level before going for a drive.