66 SPID sticker language - share and learn!

[aerotruk63]

Just got an email from a guy who's name seems to appear whenever ECL's are mentioned here's what he wrote.

Hi Norm,
Nice to hear from you. It's always good to hear from those interested in literature, codes etc.

The Exception Codes...generally two letters following an option number, are actually part of the RPO. In fact, an RPO number is incomplete without the exception letters. For example, L62AA is a complete RPO number because it completely defines the RPO.

L62 by itself is only part of the RPO because it just refers to a high performance Corvair 110hp engine but not what TYPE of 110hp engine...that is, whether it has the extra or deviation parts for its use on different models or combined with various other RPOs like with A/C, Powerglide, etc.

The exception letters have different meanings depending on the particular option they're used with, and were always changing as various models, options and option combination possibilities were introduced or canceled. Thus they can never be the same for different car lines, cars vs. trucks etc.

I'm assuming that the trucks you're interested in are the C-K variety and not Corvair trucks? I've never seen any Chevy publications that decode truck exception letters, but they certainly existed. And I don't know of anyone who's done exception letter research -- or ANY VIN or code work at all-- on the C-K type trucks. But it's way overdue!

The only way to get started would be to gather as many factory truck invoices as you can find and study the complete RPO codes on them. You might be able to define many of the exception code letters that way. I have lots of them that I'd sell for a reasonable price if you're interested.

Thanks again for your interest,
Dave