I found this site the other day doing a search for service repair manuals for my 1993 Dodge grand Caravan. I already have a Chilton and Haynes manual that I bought at the local car parts store, but I found sometimes they were lacking the information that I wanted.
Below is a link to the website that I found. For my vehicle the cost was only $8.00 for an instant download. It has more information than the other two manuals mentioned before.

http://www.tradebit.com/G/manuals/10-car

Click on the vehicle type that you want. On the next screen, in the search area, type in the year and the vehicle that you're looking for.