With the tune loaded in your pcm you can check the readiness monitors to see if they are marked as Not Ready or Not available. If they are Not Available the monitor is not there.
I assume that if...

OMG,
Is Universal Patcher that easy to use?
Did I just do what I think I did?
I clicked on the engine and changed it to 5.3 and then clicked on drivetrain type and changed it to 4wd and saved it....

Ok I installed both the Silverado Tune and the Express van tune and here are the results.

Silverado = No EGR monitor.
18083
18084
18085

Express Van = Has EGR monitor.
18086
18087

Thanks! I will test that Express BIN you posted.
I saw no difference in the bins I tested too, I wonder if it is in the diagnostic segment only? If that makes sense?
All I know for sure is the...

Thanks! Maybe I can test a Chevy Express Van BIN and see if the monitor shows just not ready as opposed to not available for the EGR monitor.

Update,
I just wanted to add some information, so I don't forget.

2001 operating systems that I have found with EGR monitors in them
12202088
12208322

For 2002 I have found this operating...

Update,
I found a program called Universal Patcher that shows information in the BIN file easy enough for me to understand.
It shows this:
Platform = GMT800 (Silverado)
Drivetrain Type = 4WD...

Well,
I found a file named 12202088_1GKEK13T31J000000 that has the EGR monitor enabled.
And the XDF file is named 12202088_release

So this is a 12202088 operating system which is supposed to be...

I need an EGR system for a LS swap I am planning.
So far my specs are
12200411 PCM
5.3 LM7
Drive by cable
4L60e
4x4


I think I am looking for a bin file for preferably OS 12212156 that has...

Hello!
I am new here, and thank you for allowing me to join this forum.
My next project that I am just starting led me here to gain some knowledge from others experiences.
My project is a 1998 two...