L.D.
Did anything change in her life when this started? I would try waking her earlier, maybe getting her to bed earlier, then making her feel like she has choices. "Which shirt do you want to wear today?" Give her time warnings - "we are leaving in 5 minutes" and if there is one thing I have heard positive things about (including from my own children), it's to make it fun! My DS2 HATES when it's time to clean, but if I tell him I'm going to set the timer, he'll ask how long he has and gets busy! See, I don't set it as a punishment or threat of one. I set it as a race and if the time is getting close but I know he's cleaning, I'll quietly add a minute or two so that he feels like he won. He LOVES the race of it. :) You could try that with getting ready - "Let's race and see how quickly we can get dressed/buckled in our carseat/etc.!"