The first generation Pontiac Grand Prix was introduced as a full size car in 1962. The first car was similar to the Catalina Coupe, but the former had a sportier body and was equipped with bucket seats. The Grand Prix was powered by a Super 421 engine. In 1963, it got a body built with better sheet metal and a newer roof and a new back window. The lenses of its lights at the back were hidden and its grille in the front was all new. In 1965, Pontiac offered the car with bench seats that had an arm rest. In the years 1962-64 it was powered by a V8 engine rated at 303 horsepower and in 1966 it had the same engine but this engine had 325 horsepower. It had a three speed manual transmission or a four speed manual transmission. The second generation Grand Prix made its debut in 1969. This car derived its power from a 428 HO engine with 390 horsepower. The interior of the car was sporty and all its instruments were in easy reach. The body of the Grand Prix remained the same until 1972, with some minor changes in 1970. It was now powered by a 370 horsepower V8 engine. In 1973 the third generation Pontiac Grand Prix made its debut. The new car was heavier than the earlier car as its bumpers had to fulfill US government rules. It got a bigger V8 engine and was equipped with a hard top. It had new bucket seats that had hand rests attached to them and was equipped with power steering and power brakes. In 1975, a new luxury model joined the lineup. It got a new speedometer whose readings were revised. This year the car came in three versions; J, LJ and IJ. Due to the addition of a catalytic converter, the horsepower ratings of the engines dropped. No changes were made to the model lineup in 1976. In 1978, the engine of the entry level J model was a V8 engine with 160 horsepower. It was now equipped with a notchback bench seat and a steering wheel that was cushioned. The other models were still equipped with bucket seats. The other models were powered by a 180 horsepower V8 engine. In 1977, the only changes that were made to the Grand Prix lineup was to the engine. While the entry level model got a V8 engine rated at 135 horsepower, the other models got the same V8 engine with 160 horsepower or 180 horsepower.

In 1978, the fourth generation Grand Prix made its debut. This was the first time in its history that a Grand Prix would not be powered by a V8 engine. The base model was now powered by a V6 engine, while the Luxury LJ was powered by a V8 engine that was rated at 135 horsepower and the SJ model had a V8 engine rated at 150 Horsepower. The gear system was a three speed manual that was fitted on the floor. No changes were made to the car in 1979 and 1980. In 1981, it got a more aerodynamic feel with a designed grille and new tail. The SJ was now replaced by a Brougham model which was equipped with power windows. In 1983, the LJ model was replaced by the LE model. In 1989, the fifth generation Grand Prix made its debut. It now came as a sedan and a two door or four door coupe. While the sedan was available in the LE or STE, the coupe models came in three versions; LE, SE, and Turbo. All Grand Prix models now came with air conditioning. While the LE was powered by a four cylinder 2.3 liter engine with 160 horsepower, the SE and STE models were powered by a 3.1 Liter V6 engine rated at 140 horsepower. There were also a limited number of Turbo Coupe models that were powered by a V6 engine. In 1991 the Turbo Coupe model was dropped and all coupes got a new grille in the front, four small headlights and new fog lights. In 1994, the Coupe became available only in the SE version. The engine was now a 3.1 Liter V6 with 160 horsepower. The sixth generation Pontiac Grand Prix made its debut in 1998. It was now available as an entry level sedan, GT coupe or sedan, and there was a GTP package that was available for both sedan and coupe. The entry level model was powered by a 3.1 Liter V6 engine, while the GT versions got a 3.8 Liter V6 engine. The GTP version was powered by a 3.8 Liter engine. It was now equipped with anti-lock disc brakes and traction control. In 1999, the horsepower ratings were revised upwards by five and the GT model got a rear spoiler. The 16 inch tires got five spokes and a stereo system with five speakers manufactured by Bose was now made available. In 2000 there was again an upward revision of horsepower and a system was installed in the vehicle to disable it if someone tried to break into it. The OnStar system was now made available on all models in 2001. The SE got a new look in the front, a rear spoiler and climate control that was dual zone and could be manually handled. In 2003, the two door coupe was dropped.

The seventh Generation Pontiac Grand Prix made its debut in 2004. It was now available as a four door sedan and came in four versions; the entry level, GT1, GT2, and GTP. The GT versions were powered by a V6 engine rated at 200 horsepower. The GTP version was powered by the same engine, but it was super charged and it was rated at 260 horsepower. In 2005, the GT1 and GT2 versions were replaced by a base and GT version. In 2006, the supercharged GTP model was also dropped. In 2007, a driver seat that was powered was added to all the models.