Just checked on MyGMLink.com
where I have my SSEi registered and it doesn't call for transmission fluid/filter until 100,000 miles or (in my case) by 11/30/2008!
However, my service manual does specify changing the transmission fluid/filter every 50k miles if you drive...
in one or more of these conditions:
- In heavy traffic where the outside temperature regularly reaches 32*C (90*F) of higher.
- In Hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or delivery service.
*If the vehicle is not used under any of these conditions, change the automatic transaxle fluid and filter at 100,000 miles.
None of which I would consider my daily commute so I feel it would fall under the last part. I'm all for preventative maintenance and all, but I have followed manufacturers schedules to a 'T' on pretty much all of my vehicles and have never had a problem.
Your driving conditions may be different from mine, and by all means, do whatever you need to do to keep the costs down. I am simply going to let the dealership handle it because that is why I purchased the extended warranty.