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1971 El Camino 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 El Camino.

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 Manual-3/4  
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  
CJJ 350-4 270-L48 Manual-3/4  
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 TH-350  
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-4 There is no proof the LS6 was ever offered to the public in a 1971 El Camino
CPY * 454-4 425-LS6 TH-400 There is no proof the LS6 was ever offered to the public in a 1971 El Camino
CPZ * 454-4 425-LS6 Manual-4 There is no proof the LS6 was ever offered to the public in a 1971 El Camino

Engine production totals are listed for all U.S. production to include all series and models of Chevelles.