Trans Flush Question (2009 Aveo5 A/T)

[Thymeclock]

So the way I see my options:

-buy a whole new flush (or fluid change) from someone else, for $150-200 (more if I demand OEM fluid) Not much cheaper to DIY

You are misinformed. You can do a drain and refill yourself and it will cost relatively little - for only the cost of the fluid itself. If I recall correctly, doing a drain and refill will use about 2 quarts.

For $25 you can buy a gallon of ATF at Advance auto. Click here. At least you won't be 'throwing good money after bad'. It can only help, and it certainly can't hurt.