I seriousely would NOT go for the tranny flush. `Ol Lady has an `02 Malibu. At 30k+ miles, had the trans flushed at the dealer. Shortly there after the tranny began slipping. It was a fight with the dealer, but they ended up fixing the tranny. Fortunatly this all happened just b4 the 36k mile warranty ended. To be safe; just drop the pan, clean it thoroughly, & change the filter. Do this every 20k to ensure that the fluid stays fresh. When you drain the fluid, be sure to trap all of it. You'll need it to know exactly how much fluid to replace, (Approx 4qts). Much to my surprise I found that these cars do not have a dip stick to check the tranny fluid level.