Buick's rarest muscle car was the 1966 Super Wildcat GS, with only 21 units ever produced, featuring a powerful V8 engine.

During the muscle car boom of the 1960s and '70s ... on which carburetor the buyer selected. For 1966 only, Buick issued a GS (Grand Sport) Performance package with dual exhausts, an upgraded ...

When the muscle car craze hit, Buick again answered the call in 1965 by putting a luxurious twist on the potent mid-sized A-body platform with the Skylark GS, then in 1970 put out the mic-drop GS ...

During the pinnacle of the muscle car golden age, the GS Stage 1 was the fourth quickest factory-built performance ride over a quarter mile, the undisputable torque king, and the best-handling ...

Buick may have the surprise issue in the super-car series this model year. The 400-cubic-inch engine in their GS series has been ... looking intermediate and/or muscle car of the season.

With 540 horsepower and 10-second quarter mile times, a Stage 2 equipped GS was the proverbial Hemi killer, Hellcats included.

Moreover, almost every muscle car available during that model year had more oomph than the Skylark GS. Things improved in 1968 when Buick released the GS 400. As the name implies, it came with a ...

Keen observers will note that Buick has essentially shoved the LaCrosse's 3.6-liter all-wheel-drive powertrain into the Regal GS. It's tempting to view this as a classic muscle-car play—like ...

in its Skylark muscle car — 1970 Buick Skylark GS 455. The Buick V8 engine in 1970 offered 350 horsepower and 510 lb-ft of torque at 2,800 rpm. This was the most torque of any American factory ...

A time capsule 1987 Buick GNX has set a new auction record for the model. The muscle car has just 8.7 miles on the odometer was sold for $275,000 at Barrett-Jackson's Las Vegas auction.