1971 Chevelle Engine ID Codes
The engine identification code consists of the engine assembly plant, the engine assembly date, and 3 letter suffix indicating the cubic inch displacement, the horsepower rating, and generally, what type of transmission was to be installed with the engine. Manual transmissions required a bushing in the rear of the bellhousing where an automatic transmission did not. Many engine "accessories" such as the carburetor, distributor, and exhaust manifolds were not installed at the engine assembly plant but rather at the final assembly plant.
While there are the suffix codes associated with the LS6 engine, there is no evidence the LS6 was ever installed in a production 1971 Chevelle.
|
Engine |
Transmission |
Notes |
||
|
Code |
Size-Carb |
HP-RPO |
||
| CAA | 250-1 | 145 | Manual-3/4 | |
| CAB | 250-1 | 145 | Powerglide/TH350 | |
| CCA | 307-2 | 200 | Manual-3/4 | |
| CCC | 307-2 | 200 | Powerglide/TH350 | |
| CGA | 350-2 | 245-L65 | ||
| CGB | 350-2 | 245-L65 | Powerglide | |
| CGC | 350-2 | 245-L65 | TH-350 | |
| CGK | 350-4 | 270-L48 | Standard | |
| CGL | 350-4 | 270-L48 | TH-350 | |
| CJD | 350-4 | 270-L48 | TH-350 | |
| CJG | 350-4 | 270-L48 | Standard | |
| CLA | 402-4 | 300-LS3 | Standard | |
| CLB | 402-4 | 300-LS3 | TH-400 | |
| CLL | 402-4 | 300-LS3 | Manual-4 | |
| CLP | 402-4 | 300-LS3 | Manual-3/4 | |
| CLR | 402-4 | 300-LS3 | Standard | Police |
| CLS | 402-4 | 300-LS3 | HD 3-speed (MC1) | |
| CAJ | 400-2 | 255 | Standard | |
| CLK | 400-2 | 255 | TH-350 | |
| CPA | 454-4 | 365-LS5 | Manual-3/4 | |
| CPD | 454-4 | 365-LS5 | TH-400 | |
| CPP | 454-4 | 365-LS6 | Manual-3/4 | There is no proof the LS6 was ever offered to the public in a Chevelle |
| CPY | 454-4 | 425-LS6 | TH-400 | There is no proof the LS6 was ever offered to the public in a Chevelle |
| CPZ | 454-4 | 425-LS6 | Manual-3/4 | There is no proof the LS6 was ever offered to the public in a Chevelle |
Engine production totals are listed for U.S. production only.
A total of 24,617 6-cyl engines were reported installed in Chevelles. However, this figure does not agree with the number of 6-cyl cars reportedly built in the U.S. of 24,475. This is a difference of 142 6-cyl engines without cars to put them in.
A total of 349,682 8-cyl engines were installed in Chevelles; 181,657 307cid, 152,390 350cid, and 15,635 402/454cid engines. However, again, this does not match the total of 8-cyl cars reportedly built in the U.S. of 344,288. This is a difference of 5,394 8-cyl engines without cars to put them in.
Engines reported for the (U.S.-built) Monte Carlo does match the production figure of 112,597 cars. Those break down to 102,192 350cid, 8,633 402cid and 1,772 454cid engines.
Chevrolet only reports 374,299 transmissions on the Accumulative Production Report of August 31, 1971. This number is only for U.S.-built Chevelles. This figure does not match the total reported U.S.-built Chevelles of 368,763. This is a difference of 5,536 transmissions (all types) without cars to put them in. The listed transmissions for the (U.S.-built) Monte Carlo does match the 112,597 engine and model production numbers.
There is no breakdown of engines or transmissions imported from Canada or installed in imported Chevelles or Monte Carlos.
