How much does it cost to change the transmission fluid? Fluid is brown. on 2009 Pontiac G3

Can u do it urself? Does the filter have to be changed as well? I do mostly highway driving. Over 35,000 miles on it.

Asked by for the 2009 Pontiac G3
Yes, I would change the filter as well. It runs about $200. You can look it up on our estimator page:
thanks for the help, why does it cost so much? Is it the filter or the fluid that costs so much? What kind of fluid does it take?

Original equipment GM filter is approx 100.00, go to NAPA it is about 19.00.