Is the heat-air controller in a 97 Olds Achieva electric or vacuum and where can you find a schematic?

On my 1994 achieva its vacume controlled i had to replace the line going to the controller. It was broken. It runs frin the top of your intake throttle body its a small line maybe 1/8 inch down to a vacume tank in lower front drivers side, from there it runs up the drivers side fender accrossed the firewall towards the top and into the passanger side through the firewall. It comes though behind the glove box and over to a vacume spliter behind the vent selecter. mine broke right at the vacume spliter. Word of advise use heavy stiff plastic vacume line to replace it anything less will colapse when vacume is applied. this solved my problem. the line is very easy to replace.