With the success of the GTO, Buick finally decided to jump into the muscle car market and offered up an optional package to the Skylark—the Gran Sport.
The 1986 Grand National's 3.8L V6 turbo engine now produced 235 hp and 330 lb-ft of torque with the help of an intercooler and a sequential port fuel injection system.
The 1985 Grand National remained largely the same with the exception of a revised front grille. The lack of changes stood as a testament to its engineering.
The Grand National actually debuted in '82, but most don't realize because these cars were not painted black. All started out as charcoal gray Regals that were shipped off to Cars and Concepts of Brighton, Michigan.
For the 1971 model year, the base Skylark was available only with the inline-6, now only putting out 145 hp (108 kW) due to emission control devices, but in a two-door hardtop coupe body-style (in addition to the previous two- and four-door sedans).
For 1970, the mid-sized Buicks once again received new sheet metal and the Buick Skylark name was moved down another notch, replacing the previous Buick Special.
The 1968 model year was one of significant change for the Buick Skylark. Although still using the same basic chassis, all of GM’s mid-sized cars adopted a policy of using two different length wheelbases.
The 1967 Skylark would welcome back the four-door sedan making a total of five Skylark body styles. Beginning with the 1967 model year, only the Skylark two-door sedan would be available with the Buick V6 engine as standard.