This would be the final year for the long Caddy limo and nine-passenger sedan (151.5 in. wheelbase and 252.3 in. overall), which weighed in at a whopping 5800 lbs. Their body style had first appeared for 1971. This year, like Fleetwood Brougham, they gained a new grille pattern plus revised cornering lamps with horizontal chrome trim. Base prices were $14,889 for the nine-passenger sedan and $15,239 for the eight-passenger limo. This model year, a total of 1,815 Fleetwood Seventy-Fives were built: 981 sedans and 834 limos.

Fleetwood remained the only American-built vehicle that was designed and built strictly as a limousine. Big Fleetwoods had two separate automatic climate control systems. Interior choices were Medici crushed velour fabric in black or dark blue, or light gray Magnan Knit in light gray. Full-width folding seats held three extra passengers. Passengers could use the control panel to raise/lower windows, turn on reading lamps, operate radio, or (in limo) raise/lower the center partition. Fixed quarter windows behind the rear doors were larger than those on Sedan DeVille. (Fleetwood Broughams had no such windows at all.)

Electronic fuel injection was optional on the 500 cu. in. (8.2-liter) V-8 engine. A cross-grain padded vinyl roof was optional. Seventy-Five models had new graphite-treated rear brake linings, reinforced shoes, and Hydro- Boost power-brake booster. They also boasted four cigarette lighters rather than the usual two.