1975 · Pontiac · United States
1975 Pontiac Grand Prix: The LJ Joins the Line
The LJ joins the line; the 455 is down to 200 hp net.
United States · researched through 2026-09-23
This record's own dek states that the LJ joins the line for 1975 and the 455 is down to 200 hp net. This record's own overview states that MuscleCarClub, crediting the Standard Catalog of Pontiac, gives 1975 Grand Prix production as 86,582, split between a base "J" hardtop at 64,581, an "SJ" hardtop at 7,146, and an "LJ" hardtop at 14,855, and that the compiled engine tables list a 400 cid V8 at 170 hp and 310 lb-ft, a second 400 cid V8 at 185 hp and 315 lb-ft, and a 455 cid V8 at 200 hp and 345 lb-ft, all SAE net as compiled with no rpm given.1
This record's own keyFacts section states that Pontiac added the Grand Prix LJ for 1975, with two-tone paint, a Cordova top and velour seating, listed at $5,995 against $5,296 for the J and $5,573 for the SJ; it also states that Pontiac's 1975 brochure lists a Maximum Mileage System for the Grand Prix, steel-belted radial tires, an improved torque converter, High Energy Electronic Ignition and a catalytic converter. This record's own prices section carries the same three factory prices for the J, SJ and LJ hardtops.2
This record's own production section carries four rows, the 64,581-unit J, the 7,146-unit SJ, the 14,855-unit LJ, and the 86,582 total, with a note that all three models share body style K57 and that the source presents the J, SJ and LJ rows as summing to the total, and a second note stating plainly that no engine, transmission, paint or trim counts were found. This record's own engines section carries the same three entries as the overview, the 400 two-barrel code R at 170 hp and 310 lb-ft, the 400 four-barrel code S at 185 hp and 315 lb-ft, standard per the brochure text, and the 455 four-barrel code Y at 200 hp and 345 lb-ft, standard on the SJ. This record's own transmissions section lists a single entry, Turbo Hydra-matic, standard.1,2
This record's own options section itemizes the Grand Prix LJ's own equipment by name: two-tone paint, body-colored remote-control mirrors, a Cordova top, stripes, custom finned wheel covers, cornering lamps, bumper guards, velour seat trim, deluxe carpeting, power door locks, power windows, door courtesy lamps, a dome reading lamp, visor mirrors, velour trunk trim and added acoustical insulation; the SJ's own equipment, the 455 V-8, stripes, Rally II wheels, GR70-15 radials and a rally gauge cluster; and a reclining passenger bucket seat. This record's own paint section is empty for the year.
This record's own interiors section carries two entries: Grand Prix LJ velour upholstery, available in black or burgundy, and mahogany woodgrain vinyl trim on the doors and center console. This record's own specifications section gives a 4,032-pound shipping weight for the J hardtop, with a note that the catalogue gives no weight for the SJ or LJ, plus a 212.7-inch overall length, 77.8-inch overall width, 116.0-inch wheelbase, front/rear track of 61.6/61.1 inches, front/rear head room of 37.5/37.4 inches, front/rear leg room of 42.5/33.5 inches, front/rear shoulder room of 58.8/58.1 inches, front/rear hip room of 54.9/52.7 inches, and the SJ's own standard GR70-15 steel-belted radials on Rally II wheels.2
This record's own performance and conflicts sections are both empty for the year, leaving no period road test and no disputed figure on record for the 1975 Grand Prix. This record's own identification section gives series 2GK, body style K57, a two-door hardtop shared by the J, SJ and LJ, sourced to the same Standard Catalog table this record's own production and price rows draw on.2
Fact sheet · 1975 · United States
The numbers
1975 Pontiac Grand Prix — The LJ joins the line; the 455 is down to 200 hp net.
Coverage: Partial — researched sections are shown; missing ones are not yet sourced. Researched through 2026-09-23.
Every figure is labeled with how sure we are. Reported means a manufacturer, registry, or reference figure we cite but have not reconciled against factory records ourselves. Disputed means credible sources disagree and both are shown. Rows are separately scoped; don't add them together unless the note says they make up a total.
Key facts
- Pontiac added the Grand Prix LJ for 1975, with two-tone paint, a Cordova top and velour seating; the Standard Catalog lists it at $5,995 against $5,296 for the J and $5,573 for the SJ.2
- Pontiac's 1975 brochure lists a Maximum Mileage System for the Grand Prix: steel-belted radial tyres, an improved torque converter, High Energy Electronic Ignition and a catalytic converter.
Production
| What was counted | Count | Basis | Status |
|---|---|---|---|
| Base "J" Hardtop1,2 Base "J" Hardtop · 2-door · not stated by source | 64,581 | built, model-year | Reported |
| "SJ" Hardtop1,2 "SJ" Hardtop · 2-door · not stated by source | 7,146 | built, model-year | Reported |
| "LJ" Hardtop1,2 "LJ" Hardtop · 2-door · not stated by source | 14,855 | built, model-year | Reported |
| What was counted | Count | Basis | Status |
|---|---|---|---|
| Grand Prix total1 not stated by source | 86,582 | built, model-year | Reported |
Production rows are the Standard Catalog of Pontiac lineage (read directly from the Standard Catalog of Pontiac, 2002, and as compiled by MuscleCarClub, which credits that book); the two are one lineage. All three models share body style K57, and the source presents the J, SJ and LJ rows as summing to its total.
No engine, transmission, paint or trim counts were found.
Prices when new
| Model | Price | Basis |
|---|---|---|
| Grand Prix J hardtop coupe (K57)2 | $5,296 | factory price as listed by the Standard Catalog, 1975 model year |
| Grand Prix SJ hardtop coupe (K57)2 | $5,573 | factory price as listed by the Standard Catalog, 1975 model year |
| Grand Prix LJ hardtop coupe (K57)2 | $5,995 | factory price as listed by the Standard Catalog, 1975 model year |
Prices are the nominal dollars of the day, not adjusted for inflation.
Engines
| Engine | Factory rating | Availability | Built |
|---|---|---|---|
| R · 400 cid V81 400 cu in · 2-barrel | 170 hp, 310 lb-ft (SAE net (per source's note that post-1972 ratings are net)) | Not yet sourced | |
| S · 400 cid V81 400 cu in · 4-barrel | 185 hp, 315 lb-ft (SAE net (per source's note that post-1972 ratings are net)) | Not yet sourced | |
| Y · 455 cid V81 455 cu in · 4-barrel | 200 hp, 345 lb-ft (SAE net (per source's note that post-1972 ratings are net)) | Not yet sourced |
Ratings are the manufacturer's advertised figures under the standard shown (SAE gross before 1972, SAE net after). They are not dyno results, and gross and net ratings can't be compared directly.
Transmissions
| Transmission | Availability | Built |
|---|---|---|
| Turbo Hydra-matic | standard | Not yet sourced |
Options and packages
| Code | Option | Price | Installed |
|---|---|---|---|
|
Grand Prix LJ equipment: two-tone paint, body-coloured remote-control mirrors, Cordova top, stripes, custom finned wheel covers, cornering lamps, bumper guards, velour seat trim, deluxe carpeting, power door locks, power windows, door courtesy lamps, dome reading lamp, visor mirrors, velour trunk trim, added acoustical insulation | — | Not yet sourced |
|
Grand Prix SJ equipment: 455 V-8, stripes, Rally II wheels, GR70-15 radials, rally gauge cluster | — | Not yet sourced |
|
Reclining passenger bucket seat | — | Not yet sourced |
Interiors
| Code | Trim | Built |
|---|---|---|
|
Grand Prix LJ velour upholstery, available in black or burgundy | Not yet sourced |
|
Mahogany woodgrain vinyl trim on the doors and centre console | Not yet sourced |
Specifications
| Measure | Value | Applies to |
|---|---|---|
| Shipping weight2 | 4,032 lb | Grand Prix J hardtop (the catalogue gives no weight for SJ or LJ) |
| Overall length | 212.7 in | Grand Prix hardtop coupe |
| Overall width | 77.8 in | Grand Prix hardtop coupe |
| Wheelbase | 116 in | Grand Prix hardtop coupe |
| Track, front/rear | 61.6/61.1 in | Grand Prix hardtop coupe |
| Head room, front/rear | 37.5/37.4 in | Grand Prix hardtop coupe |
| Leg room, front/rear | 42.5/33.5 in | Grand Prix hardtop coupe |
| Shoulder room, front/rear | 58.8/58.1 in | Grand Prix hardtop coupe |
| Hip room, front/rear | 54.9/52.7 in | Grand Prix hardtop coupe |
| SJ standard tyres | GR70-15 steel-belted radials on Rally II wheels | Grand Prix SJ |
Identification
- Series and body
- Series 2GK; body style K57 two-door hardtop for the J, SJ and LJ.2
Identification
Read a 1975 Pontiac VIN
The VIN decoder runs in your browser and never sends the VIN anywhere. How the factory numbered this year's cars:
Same model year
Also in 1975
- AMC AMX No AMX was sold in the United States for 1975. The Javelin ended after 1974, and the badge returned on the 1977 Hornet.
- AMC Gremlin X and Spirit AMX Catalytic converters arrived, and steel-belted radials became standard with the X package.
- Buick Riviera Stage One dropped; the GS handling package continued on 3,101 of 17,306 cars.
- Buick Skylark Gran Sport, GS and GSX The endpoint: the Gran Sport survived only as a Century coupe trim package with the 231 V-6 or 350 V-8; no 455 was offered.
- Chevrolet Chevelle and Malibu SS The Laguna Type S-3 got its aerodynamic nose; 7,788 were built, and the 454 was listed at 215 net hp.
- Chevrolet Chevy II and Nova A 262 V8 appears for one year in the source engine table; Nova LN (RPO Z11) luxury option. Enthusiast-compiled production: 272,982 cars; Super Sport 9,067.
- Chevrolet El Camino SS Colonnade-era El Camino; Chevrolet's 1975 data pages define the RPO Z15 SS option for the El Camino Classic. Team Chevelle's production totals give 33,620 El Caminos built, 3,521 of them with SS equipment.
- Dodge Dart GTS, Swinger and Demon The Dart 360 Sport continued into 1975 at $4,014, but Flory prints its production as not available.
- Ford Maverick Grabber The Grabber's last year: 8,473 by Classic Industries count, about 8,500 per Consumer Guide.
- Ford Ranchero GT The Ranchero GT continued on the 1972-76 Ranchero; 6,114 GTs were built, per reference-site counts in the Standard Catalog lineage.
- Ford Thunderbird Sixth-generation personal-luxury Thunderbird; the record holds the production total and the luxury-group option prices only.
- Ford Torino The last Gran Torino Sport year: 5,126 were built as Torino production fell to 195,110, with a 351 standard and automatic transmission on every car.
- Mercury Cougar Outside the muscle focus: 62,987 Cougars for 1975 per Wikipedia's table.
- Oldsmobile Cutlass, 4-4-2 and Hurst/Olds The Hurst/Olds introduced Hurst Hatches T-tops on the Cutlass Supreme coupe; 2,535 were built, 1,293 white and 1,242 black.
- Plymouth Duster 340 and 360 Duster volume fell by more than half in 1975 and the Duster 360, now automatic-only in the brochure, to 1,421 cars, priced at $3,979.
- Plymouth Road Runner The Road Runner moved to the Fury host for one year.
- Pontiac Firebird and Trans Am The year the Trans Am took over the line: 27,274 built, more than twice the Formula.
- Pontiac Grand Am The last of the Colonnade Grand Ams: catalytic converter, a $4,887 start, and 10,679 built.
- Pontiac Tempest and LeMans Catalytic converters, standard radial tires and Radial Tuned Suspension arrive, the 455 leaves the LeMans, and the GT option becomes an automatic-only V8 package.