what does the SJ stand for ?????
The basic trim level for the Grand Prix was called "Model J"; the "SJ" trim designation was for "Sports J", and the "LJ" trim was the "Luxury J". Some people say that the "Model J" name was meant to remind people of the supercharged Duesenberg Motors "Model J" cars of the 1930s.
The J model was named after its designer, John Deloran.
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