I have a 2011 Chevy Cruze
I have a 2011 Chevy Cruze with a sealed transmission. When I first bought the car, I was led to believe that I could not service the transmission myself, but had to take it to a mechanic. That turned out to not be true. In fact, not only could I replace the transmission fluid myself, but that after 120,000 miles, it is recommended. Doing it myself cost approx. $100. Of coarse, the professionals charge about $250. So saving some money was nice. The caviat is that changing the fluid myself isn't the same as a flush. The process of pushing out the old fluid under pressure is much more thorough. So, change the fluid every 50000 miles after 120000. And as long as you aren't finding any debris in the fluid, you're good to go.