Also, http://www.goodwrench.com/Tips/OwnerManuals.jsp . For "only" $400 you can get the manual on DVD which includes all GM vehicles from 1998 to 2008, including bulletins. Or just the Aveo's two volume manual for $135, which isn't all that expensive considering how much money you can save by doing your own work.
If you're serious about doing your own work, I would go along with getting the manual. You can order directly from Helm, Inc. It only took about 6 days from the time I ordered mine until it showed up on my porch.