I recently went to the Chevy dealer to get a build sheet on my car. I was going through it and everything was pretty clear accpet for this one code: 1SZ- To residents of Texas. Thats all it says. WTF does that mean? This car was never in Texas. Has anyone ever seen that or knows what it means?

 

All codes start with PO.

 

i think he's talking about the rpo codes.... the only thing i can tell you about 1sz is that it's some kind of group savings.. i have that one on my car too.... that's about all i can tell you....

 

Ok, maybe all LS1's have Texas in them. Also next to LS1 it said 350HP.