1997 Buick Skylark changing transmission fluid

When they say that it means they are just dropping the pan and replacing what is in the pan and filter with new fluid. There is still a LOT of dirty fluid left in the tranny and torque converter that will get mixed right back into the new filter as soon as you drive. Some people like the pan drop and others like the complete flush. Honestly I would go with the flush but ultimately it is your decision.