Question about 1995 Chevrolet G20

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Where does the a/c system get its' vacum - 1995 Chevrolet G20

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Vacuum for the controls originates at the intake manifold. Check to see if there is a vac. diagram under the hood and or "dog house" (inside engine cover) if there is you can trace the source. It is not uncommon for vac. lines to collapse from age or contact with various chemicals (oil, cleaners) over time.

Posted on Jul 22, 2010

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Posted on Jan 02, 2017

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1 Answer

My BMW 330i has a whisteling sound when driving but stops when I brake.


could be a vacum leak the break system uses an air diaphram to help assist on the power side of the breaking system go to how stuff works .com and look up how breaks and mastercylinders work it will explain how it uses vacume to assist the master cylinder but it sounds like u have an vacume leak

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Block diagram of the IWE system
b893440.jpg

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


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

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