The Grand Prix was a line of automobiles produced by the Pontiac Division of General Motors from 1962 through 2002 for coupes and 1988–2008 for sedans. First introduced as part of Pontiac's full-size car model offering for the 1962 model year, the marque varied repeatedly in size, luxury, and performance during its lifespan. Among the changes were positioning in the personal luxury car market segment and mid-size car offering from the 2nd generation to the 5th generation for the sedan and from the 2nd generation to the 6th generation from the coupe; it returned to a full-size car from the 6th generation to the 7th generation for the sedan, positioned below the larger Bonneville in Pontiac's model lineup.
Second generation (1968-1972)
1969
Pontiac's general manager John Z. DeLorean ordered the development of an all-new Grand Prix for the 1969 model year. It featured dramatic bodywork and a highly pronounced grill, and rode on a slightly stretched version of the intermediate GM A platform dubbed the G-Body.
Market
DeLorean and other Pontiac planners saw a way to reverse the declining sales of the full-sized Grand Prix by creating a new niche in the burgeoning personal luxury car market. Smaller than the hulking Cadillac Eldorado and Oldsmobile Toronado, but positioned to be nimbler and more performance oriented than the slightly less bulky Ford Thunderbird and Buick Riviera, the new Grand Prix was designed to outshine the upscale Mercury Cougar XR-7 Pony car and B-bodied performance-oriented Dodge Charger intermediate.
Sales reached over 112,000 units, almost quadruple the 32,000 full-sized models built in 1968. The similar but less luxurious Chevrolet Monte Carlo followed in 1970. Ford and Chrysler responded by producing plusher versions of their intermediate Torino and Charger, but both eventually created newer entries to the intermediate personal luxury car battle—the Ford Elite in 1974 and Chrysler Cordoba in 1975.
Development
The new intermediate-based 1969 Grand Prix began to take shape in April 1967, with a few prototype models built on the full-sized Pontiac platform before the G-Body was ready. To save both development costs and time in much the same manner Ford created the original 1964 Mustang using the basic chassis and drivetrain from the compact Falcon, the revised Grand Prix would have a unique bodyshell but share the A-body intermediate platform and mechanicals with the Tempest, Le Mans and GTO. This reduced development time from the usual 36 months required for a new model to less than 18, allowing Pontiac to concentrate upgrading styling and interior appointments.
Shortened by three inches from the previous Catalina wheelbase, the 118 in (3,000 mm) 1969 Grand Prix finally had its own body – and Pontiac's longest-ever hood. Like all but the short-lived 1967 convertible, the new Grand Prix was a 2-door hardtop. Model names borrowed suggestive Duesenberg Model J nomenclature for "J" and "SJ" levels of trim.
The basic 1969 body shell saw a major facelift in 1971 bracketed by minor detail revisions in the 1970 and 1972 model years.
Features
The new Grand Prix sought to deliver performance as attention-getting as its styling, with increased installation percentages for manual transmissions and engine options up to the 390 hp (290 kW) 428 HO. Two engine sizes were offered with two power options were available in each engine size; a 265 hp (198 kW) or 350 hp (260 kW) 400 cu in (6.6 L), as well as a 370 hp (280 kW) or 390 hp (290 kW) 428 cu in (7.0 L) V8.
The 1969 Grand Prix debuted a dramatic "Command Seat" wraparound cockpit-style instrument panel that placed most controls and gauges within easy reach of the driver. Enhancing the interior's sporty look, the "Strato" bucket seats were separated by a console integrated into the instrument panel that slanted toward the driver, which included a floor shifter, storage compartment, and ashtray. A leather trim option which also replaced nylon loop rug with cut-pile carpeting was finally offered in addition to the redoubtable Morrokide vinyl and cloth and Morrokide upholstery offerings.
Innovations in 1969 included a radio antenna embedded in the windshield, flush-mounted "pop-open" exterior door handles, side-impact beams inside the doors, and an optional built-in electrically heated rear window defogger.
Steam powered prototype
Pontiac also in 1969 built a steam powered SE 101 concept car with a 150 hp (112 kW) engine designed by GM engineering in conjunction with the Besler brothers. The engine, however, was 450 lb (200 kg) heavier than a V8, and three times more expensive to make.
1970
Vertical grille inserts replaced the horizontal bars of the 1969, movement of "Grand Prix" nameplates from the lower cowls to the rear C-pillars and the vertical chromed louvers from the C-pillars down to the lower cowls, highlighted the 1970 Grand Prix. The optional 428 cu in (7.0 L) V8 rated at 370 and 390 hp (290 kW) in 1969 was replaced by a new 370 hp (280 kW) 455 cu in (7.5 L) with 500 lb⋅ft (680 N⋅m) of torque at 3,100 rpm. The base 350 hp 400 cu in (6.6 L) engine was still standard, but a low-compression 400 CID engine was available with a two-barrel carburetor. An automatic transmission was offered as a no cost option.
Interior trim also received minor revisions, and a bench seat with center armrest returned as a no-cost option to the standard Strato bucket seats and console. Bench seat-equipped Grand Prixs got a steering column-mounted shifter with the automatic transmission along with a dashboard-mounted glovebox, replacing the console-mounted shifter and glovebox of bucket-seat cars. Power front disc brakes became standard equipment this year.
Due to the success of the 1969 Grand Prix, other GM divisions followed suit and introduced similar cars for 1970. The Chevrolet Monte Carlo used the same basic G-body as the GP but with a two-inch shorter wheelbase (116 vs. the GP's 118) and a long hood, though still shorter than the Grand Prix's, but still considered an upscale vehicle for GM's lowest-priced division. Oldsmobile, whose larger and more expensive front-drive Toronado was a direct competitor to the Thunderbird, decided to further capitalize on strong sales of its intermediate Cutlass line by introducing a new Cutlass Supreme coupe with a formal roofline similar to the GPs but on the standard 112 in (2,800 mm) wheelbase used for two-door A-body intermediates and the same lower sheetmetal used on other Cutlass models. Both the Monte Carlo and Cutlass Supreme were also much lower in price, primarily due to smaller 350 cu in (5.7 L) standard engines for both, and that many items standard on the GP were optional on those models — however, all three cars with similar equipment were actually much closer in price than the base sticker prices suggest. The introduction of the Monte Carlo and Cutlass Supreme did, however, cut into the Grand Prix's dominance, and sales dropped 40%. 65,750 Grand Prixs were built in 1970.
Variations of the 1969 GP's central V-nose grille appeared on other 1970 Pontiacs including the full-sized cars and intermediate Tempest/Le Mans series. The 1970 Ford Thunderbird styling change was reportedly ordered by Ford Motor Co. president Bunkie Knudsen, who moved from GM to Ford in 1968 after a long career at GM which included the position of general manager for the Pontiac Motor Division from 1956 to 1961 and ordered the addition of the Grand Prix to the 1962 model lineup.
Source: Wikipedia
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