What ECM and chip code are in my 90 Blazer

[eagle mark]

Does anyone know the ECM and chip code are in my 90 Blazer 5.7L auto?

I got a Pocket Programmer 3 and can now get rid of the egr code that keeps setting by disabling it! Ha!

 

[b454rat]

It will have the 7747, but need to physically look at the ECM to see what the service code is. But here is a link, maybe poking around there you can find it....

http://www.diy-efi.org/gmecm/ecm_info/1227747/

 

[eagle mark]

I was looking around there last night and didn't see it.

Or I could pull it out today now that it's light out...