Can anyone help me out here. I was running my RPO codes, an came across 5 that the decoder cannot locate.
They are as follows:
1- A4L
2- E7Z
3- GC5
4- GC6
5- Z31

I thought maybe i copied them wrong, but rechecked, and they are correct.
Any help would be greatly appreciated

Try out the Tech section on my site, they may be there...I'm in a bit of a rush or I would look for ya.

Nice site you have IROCKER. Very well done. I looked for those codes, an came up with nothing. Maybe ill just call a dealer, an have them check it out for me. Thanks for your help.

Ok, so i called a Chev dealership. They dont know what these codes are either, they find this very odd. For the 3rd time, i have checked the numbers to be sure i correctly wrote them down. Dunno what to do now.
Another question----- Is a Dealer Ordered Car, a special order by a customer, or just the dealer askin to have one on their lot??
This is buggin the SH%t outta me, wonderin if theres something different than normal about the car.

That is very strange... maybe you should put a post up in one of the main boards

I also had around 5-6 codes that were non exsistant for my 85 Iroc.

Actually just found my RPO codes that i wrote down and have the same ones as yours except for the first one A4L.

I had a few that I couldn't get on my car as well... oh well... I don't know what to say.. if the dealer can't even find them, then who else could know?

When i had my rpo's decoded by the dealer, there was about 10 codes that came up as "no description available" I ran them on other websites decoders and there was no listins of them.
I also have the RPO #z31. I was looking at your codes and the only thing that came close was AL4-SEAT, R.R.BKT
E7Z-Key, SPEEDOMETER (delete)
Don't ask me what they mean, I haven't a clue.

my car too has the same unknown codes plus a few extras. gc5, gc6 are some kind of paint codes if i remember correctly, it was in the history board a while back.

Thanks for the comps on the site. There is so much work I have to do now to update it and there is soooo much technical stuff I want to add. Just need to find the time.

Well, I check the Camaro White Book as well and no luck. I wouldn't worry about it too much. I know there was some on RPO build sticker that I could decode either.

Thanks to all who tried to help me out, much appreciated