1966 Chevrolet full-sized Impala, Bel Air and Biscayne model production:

1966 Chevrolet Impala SS	119,314
1966 Chevrolet Impala	654,900
1966 Chevrolet Bel Air	236,600
1966 Chevrolet Biscayne	122,400

Note: These numbers are rounded to the nearest hundred produced.

The full-sized Chevrolet Impala, Bel Air and Biscayne took a step down as the Caprice became the new top of the line Chevrolet full sized model. Thus taking over the Impala's luxury image. 1966 Chevy full-sized styling changes included the loss of the famous signature round taillights, which had been an Impala trademark since 1958. New large rectangular ones replaced them along with a more massively styled front end.