Does the GU5 code on the door panel mean it has a 3.25 gear?

My car has the GU5 code on the side panel and I read something on the forum but not exactly sure about it, but does it mean that if it says GU5 on the side of the door it has the 3.25 gear or what is it? Also, what other codes should I look for?

If the RPO sticker says GU5, you have 3.23's. ;)

What do you mean by "codes to look for"? :think:

There are plenty of sites for RPO codes, but here's a good one to start with: http://www.f-body.org/tech/

TS

Cool thanks.