These hot Buicks defined American muscle in the 1980s. The Buick GNX (short for “Grand National Experimental”) was the ...

Street Legal Performance (SLP), the boys known for beefing up muscle cars, are hatching a plan to bring the Grand National nameplate back to Buick. SLP recently acquired the rights to “GNX”, a ...

The Buick Grand National Experiment, or the GNX for short, was a limited edition model from Buick that was released in 1987.