1975 Pontiac Grand Prix

A revised grille with fewer vertical bars and revised taillight lenses marked the 1975 Grand Prix, which gained General Motors' High Energy electronic ignition and a catalytic converter that mandated unleaded gasoline, ending dual exhaust and detuning the engines. A new luxury LJ model was the new top model, the 400 V8 dropped from 230 to 180 horsepower, and sales dropped to 86,582 units, of which 64,581 were base J models, 7,146 SJs and 14,855 LJs.