[GNXClone]

I'm asking because I've read that all Z71's have locking differentials.

However, while I do have RPO code Z71, I do not have RPO code G80.

Verified my codes from the RPO sticker in the glove box, and by my VIN on compnine.

 

[gmc00z]

2000 gmc z71 here with no g80, i like it better this way. Has saved me from buying a new rearend being undergeared and running 37s

 

[GNXClone]

Thanks!

I found more info. Seems like G80 may have been required in later years (2004 - on) as a prerequisite for Z71. So that's probably where the "if you have a Z71 you have a locking diff" myth came from.