Castrol

It is the same thing it comes from the factory with.

Thats what I was expecting, but did not want to hear. Any suggestions on the exact fluid to use? If it would viod my warranty than I would have to get it done somewhere other than the dealer, correct?

Quite a few of us like Amsoil Synchromesh. It's a close match for viscosity, and shifts better hot and cold.

How-to on how to change it: http://www.cruzetalk.com/forum/57-how-library/6627-how-change-manual-transmission-fluid.html

If you ask the dealership for the oem factory fill using the cruze manual gm part # for the manual transmission which the manual says is castrol bot 402 you will get a bottle of acdelco bot 303. I replaced my manual transmission oil at 100k with the bot 303 and my shifts are very smooth and fluid.