I agree with you on the fluid needing to be changed even though Chevy doesn't say when. I plan to change mine around 30k to 50k range myself. Weber Auto did a teat down of the motor and in it he talked about how to drain and refill the motor. I would also say getting a service manual wouldn't be a bad idea.Hi all, I just entered the 73k mile mark and can’t stop thinking about the transmission fluid. As far as I am concerned, there is no such thing as “lifetime” fluid and was wondering if anyone has changed their transmission fluid? Thank you in advance. Oh and btw, current gas prices in CA are $4 a gallon, super happy with the bolt.