Hi Lisa,
Awesome that you are planning a second trip to Disney! I love the Lights, Motors, Action! Extreme Stunt Show! I'm always amazed at the precision driving during the show. I checked the calendar on the WDW website for closures during September and didn't see any scheduled operational closings for the show. I'd recommend keeping an eye on the website. To see scheduled closings for Disney Hollywood Studios, go to the online calendar for DHS by clicking
here.
From there, choose September 2010 from the drop down list beside the
View Month tab. That will give you a list of the hours of operation & Extra Magic Hours for each day. To check for scheduled Operational Updates, click on your dates of travel. To the right of the schedule for a particular day, you will see closings if any are scheduled.
You can also check on
www.allears.net. Search for "Rehabs and Closures". It is an unofficial Disney website but they do an excellent job of giving you the info in one location. You can always confirm by clicking on the link on the official Walt Disney World website shown above. Keep in mind that attractions are always subject to close without notice for a number of reasons.
I will keep my fingers crossed for you that you are able to see it this trip. Wishing you many magical memories :-) Allison