More than 201?

[scuncio]

Where is that excerpt from?

[442w30]

Originally Posted by scuncio

Where is that excerpt from?

From a booklet that has every option available and the number built of each. But it's much more complicated than that. Look at the entry here on ECL codes:

http://chevellestuff.net/qd/terminology.htm

Those are the codes with two letter characters. Sometimes an option, like 3.55 gears, has a dozen ECL codes, all signifying a different application (possibly engine, tranny, and maybe something else). I don't know much about this but this is what I have been able to gather. There probably is a key that shows what each of the codes mean, but AFAIK a few Corvette folks have that key and haven't shared it with anyone. But it's the reason why Corvette info exists, while other Bow Tie vehicles have scant information.

[Keith Seymore]

Originally Posted by 442w30

From a booklet that has every option available and the number built of each. But it's much more complicated than that. Look at the entry here on ECL codes:

http://chevellestuff.net/qd/terminology.htm

Those are the codes with two letter characters. Sometimes an option, like 3.55 gears, has a dozen ECL codes, all signifying a different application (possibly engine, tranny, and maybe something else). I don't know much about this but this is what I have been able to gather. There probably is a key that shows what each of the codes mean, but AFAIK a few Corvette folks have that key and haven't shared it with anyone. But it's the reason why Corvette info exists, while other Bow Tie vehicles have scant information.

I'm not sure that does make it more complicated; using the example from the link even if the broadcast code was L34-TX or L34-TW they both would fall under the L34 RPO and be counted as such.

K

[Keith Seymore]

Here's how it appears on a truck SPID from the era.

In this case the engine is an L47, with an ECL of "20" (whatever that means, as you say).

The ECL describes additional detail beyond the RPO, defining proliferation for that component. For an engine, it might define AC vs None, multiple carb vs single, manual trans vs auto, California vs Federal emissions, etc. For a rear axle, it would define ratio, locking vs open, perhaps special brake friction material, etc.

So while we know what the ECL does - we don't necessarily have the secret decoder ring.

K

[Keith Seymore]

By the time I started with GM (1979) the ECL fell into disuse, so I don't have any firsthand experience with it.

Broadcast codes were still used on the build sheet to facilitate the operations on the line but were no longer reported on the SPID label.

K