Base LeMans and Sport Coupe models carried over trim only slightly revised from 1974 including a revised Custom Cushioned steering wheel. Big news for 1975, however, was Pontiac's Maximum Mileage System which consisted of GM's new catalytic converter which reduced emissions while improving drivability and fuel economy, a High Energy electronic ignition, and lengthened routine maintenance intervals. Radial tires were standard on all models and a "Radial Tuned Suspension" option was available that included upgraded radial tires along with front and rear sway bars.
Engines were revised for 1975 to meet that year's emission requirements and mated to the catalytic converter, which spelled the end of true dual exhausts. The 250 cubic-inch Chevy inline six was standard on base LeMans coupes and sedans while the 350 two-barrel V8 was optional and standard on the LeMans Sport Coupe, and Grand LeMans sedans and coupes, and optional engines on all of those models including a 350 four-barrel and a 400 two-barrel. LeMans and Grand LeMans Safari wagons came standard with a 400 four-barrel engine that was optional on other models.
The 455 V8 was discontinued for all LeMans models for 1975, but still available in the Grand Am. Transmission offerings included a three-speed manual standard with the six-cylinder and 350 two-barrel V8, with the three-speed Turbo Hydra-matic optional with those engines, a "mandatory" option with all other engines in sedans and coupes, and standard on the Safari wagons. The Hurst-shifted four-speed manual was no longer offered.
1975 History and Identification A-Body
Having production of only 8,786 copies this season was the sporty Grand AM two-door Notch Back Hardtop, which came standard with a special Endura nose piece and "windowless" rear quarter roof styling. It was base-priced at $4,956 and had a shipping weight of 4,148 pounds. Standard features for all Grand AMs were about the same as the previous year. The Standard Grand AM powerplant was again a 170 horsepower Pontiac "400" V-8 with only two-barrel induction. A 200 horsepower edition of the 455 cubic-inch engine was available at extra cost. Style Number 2AH37 was applied to this car.
It now had a base price of $5,045 and a curb weight of 4,185 pounds. Originally hailed as an "American Mercedes-Benz," the four door Grand AM seemed hard to sell to domestic buyers. Because of the Endura nose treatment, both Grand AMs were a few inches longer than other intermediate models with similar "Colonnade" styling. The Coupe was 211 inches from end to end and the four door Hardtop was four inches longer still.
1975 Grand Lemans
The two-door Notch Back Hardtop was listed as Style Number 2AG37 and featured the "Colonnade" look with glass opera windows. Buyers had a choice of Notch-Back bench or bucket seats. This particular model had prices beginning at $4,321 with a shipping weight of 3,823 pounds. It accounted for 19,310 deliveries and was the most popular of all Grand LeMans offerings.
It was sometimes also called the "Colonnade Hardtop Sedan," but the official designation was Style Number 2AG29. It had a production run of 4,906 units. With prices beginning at $4,377, this car listed a shipping weight of 3,916 pounds. This example seems to have many options and accessories including whitewalls; a Cordova top; sport miriors, and rear bumper guards. The 250 cubic-inch Six was the base engine for both Grand LeMans Hardtops.
It had prices that started at $4,047 and a weight of 3,859 pounds. A three-speed manual transmission with column-mounted shift lever was standard equipment, although a steep 98 percent of all units built were delivered with Turbo Hydra-Matic attachment. A four-speed manual gearbox was no longer provided except for Astre and Firebird models.