GM-GMC: 92 GMC Sierra 1500 4.3L Check Engine Code, gmc sierra, vacuum line

Question
Thanks in advance. I do not have FI. I have received a trouble code of 32. I was shown it means to replace my EGR Valve/hoses. Before the 32 code, it flashed a 12 code. I was told to ignore this first code. I am looking for a second opinion/confirmation that this does indeed seem accurate to you also before I replace the EGR.
Thanks to a particular Autozone Manager who showed me how to get my trouble code and also gave me the key to get any in the future.  

Answer
According to the Internet, 32 is an EGR system fault on fuel-injected engines.  On carbureted engines, 32 is the baro-sensor or its circuit.  I would guess that is the manifold absolute pressure (MAP) sensor.  The MAP sensor is shown in the photo in this URL: http://www.rockauto.com/ref/ACDelco/Detail.html?213-185.jpg
It may be on the engine or the firewall.  It has an electrical connector and a vacuum line connected to it.

The 12 code is normal and can be ignored.