Where can you find a vacuum diagram for a 1982 Chevy s10?
I own this same truck and I have also been tormented with this question. Best bet though is to get a true 1982 Chevy S10 Shop Manual which you can order online (like I am going to do) or you can possibly find it at your local library. Only problem with the Library though is usually they will not allow you to take the book with you so you'll have to copy the page with the diagram.
Helm Inc sells the official shop manual as they are the company that has been printing GM's material for generations. Here is a link to the manual and its $75.00 which isn't bad at all to have every detailed information on every little spec of this truck which for the S10 line is a true one of a kind as it was the first!