i wanted to know where does the vacuum line run to on a 97 pics would be helpful

The reason i was asking was because my 01 regal gs has a vacuum line running under the supercharger to fpr and to the map sensor and to the bbv. And if you take off the line there is vacuum there but on my girfriends ssei there is a vacuum line going to the fpr and to the bbv and there isnt any vacuum when you pull the line off.i just wanted to make sure everything is hooked up correctly.

The 96 & 97 B'villes 97 GP'* and 97 Regals all had a vacuum tree by the BBV on the supercharger. One of the branches heads over to the fpr, the other to the BBV or BCA for the SC'd term.

In 98 GM changed up and didn't drill the hole for the vacuum tree. From that point on they used a T under the snout into the LIM and ran line forward from the LIM.

All years had a branch going from the LIM to the map sensor(*). There is no difference in where you choose to get the vacuum on a 96-97 (LIM or vac tree). Many upgrade their chargers for ported ones and change over the vacuum lines since most vendors won't take 96-97'* as cores.

Side note: 96 was the only year of the Gen 3 M90 SC to have coating on the body. All years has a coated nosedrive.

this vacuum tree you are refering to is on top of the supercharger the black plastic one with the brake booster hose is the only one there. and on a 97 is there supposed to be vacuum at the fpr line at idle?

You should be able to see most of the vac lines here. This is on a 97.

well i see a problem my supercharger doesnt have that vacuum tree on the side and my car is a 97.

Are you saying there'* not even a spot for it, or it the tree missing?

see if these pics help

Ya, that does look different. I'll wait for Bill to take a look.

Look at your production date. Maybe it was a very late 97 and they were ran out of the 97 chargers with trees.

In most peoples opinions you have the better design. Your vacuum for fpr and bcs comes from a T