Which U.S. model has been in countinuous production the longest?

Just a WAG, but I’d bet its the Corvette. Circa 1953

It gets tricky figuring out what is considered the same car in continuous production. Example, Chevy made a sedan which I believe was simply refered to as the Chevy, but they had three options packages that modified the same car. The packages were titled the Implala, Caprice, and I can’t recall if it is unnamed of if there is a third package. Now you know that there is a Caprice and a Impala (continuous I don’t know) today, but since they are branched off of the original car is it the same model? It all comes down to definition. Also some cars are redisigned to be part of a totally different class, like from a compact to a sedan. Are the still the same car, just because they carry the same nameplate?

The facts expressed here belong to everybody, the opinions to me. The distinction is
yours to draw…

Omniscient; BAG

I’m pretty certain the Impala was discontinued for awhile.

Carpe hoc!

My guess would be the Ford F-Series pickup, or is that too general for your question?