Buick automotive ebooks
 

http://www.pdfee.com/cat/automotive-ebook/car-buick
I was looking around and stumbled on to this site. It is always good to have manuals, however it may not be repair manuals it is still good to see if you can use some of it's content.

maybe if you have time, you can search and find something for you Buick and post it in your section. I will look around for my 1969 buick and just populate what ever I can do to make my 69 project easier

Well further look into this site, there is not much here. :( But it is a Start. I like to find manuals for any project I work on. and If I can find in online even better.
I used to Work on my 2000 TL 1000 Sport Bike, and there is a large PDF website for almost any make and model, so I don't know if this site has a section like this.