Vacum line diagram - 1991 Suzuki DR 350 S

this is for the 2.5L engine

images for 96 Lumina 3.1 liter Vacuum Line

Should be a diagram underhood. Need engine size etc. to find exact diagram online

Chilton or Haynes book will have the diagram also you can search on the net

IF this is a case that the IWEs will not disengage, it could be the IWE solenoid or the vacuum lines to the IWEs. Could also be a problem with the vent lines from the IWE ( the other vacuum line that runs up into the engine compartment, and just hangs there ).

This is the block diagram of the vacuum lines for the IWE ( not actual routing ). You can use a vacuum pump / gauge to see if the lines will hold vacuum. Don't be surprised if the vacuum lines test OK, there is a TSB on the IWE solenoid where it could ingest water, and allow water in the lines, which will not keep the IWE gears disengaged.

Block diagram of the IWE system


TSB on the IWE solenoid ( right click save as )
http://my.voyager.net/~sscully/file_tsb06_08_15.pdf

helm inc if you can't get them for free

If its not located under the hood then go to the local library and use there auto manuals.

See if this is what you are looking for. I hope that this helped and best wishes.

open the hood and see if there is a diagram for vacuum lines on the front rail above the radiator. or under the hood itself.

You can find these vacum diagrams in dealer level emission manuals, or in some Hayes publications, which are avaliable at most public libraries.