The 1987 Buick GNX represents the absolute pinnacle of American performance from the late eighties era. This particular example, numbered 447 of just 547 units, is a true survivor with only 1,200 original miles. Acquired from a private Illinois collection, it has been preserved as a mechanical time capsule for decades. The car is finished in its signature sinister black paint over a black and gray cloth interior. Buick collaborated with ASC/McLaren to create this “Grand National Experimental” as a final send-off for the G-body chassis. Every GNX was hand-modified to outpace the world’s most elite supercars of its day. Today, these limited-production models are among the most coveted pieces of automotive history for serious collectors. This Florida-based offering comes with extensive documentation, including the original window stickers and a clean Carfax report.
ASC McLaren Engineering and Exterior Identity
The exterior of the 1987 Buick GNX is defined by its purposeful and monochromatic black-out styling. Functional heat-extracting fender vents were added to manage the increased thermal load from the modified turbocharger system. Composite wheel arch flares were also installed to accommodate the wider 16-inch cross-lace wheels and performance tires. A three-piece rear spoiler provides additional high-speed stability while maintaining the truck’s aggressive, boxy silhouette. GNX-specific badging is found on the grille, trunk lid, and wheel centers for clear model identification. This example retains its original bumper filler panels which were recently replaced to ensure a perfect cosmetic finish. The paint remains deep and reflective, consistent with a vehicle that has spent its life in climate-controlled storage. Dual exhaust outlets provide a subtle hint at the immense power lurking beneath the hood.
Preserved Interior and Serialized Documentation
Inside, the 1987 Buick GNX features a driver-centric cabin upholstered in black cloth with Sand Gray inserts. The front bucket seats prominently feature “Turbo 6” embroidery on the headrests as a nod to its heritage. A serialized plaque on the passenger side of the dashboard officially identifies this car as GNX number 447. Unlike standard Grand Nationals, the GNX utilized Stewart-Warner instrumentation for more precise monitoring of engine vitals. This cluster includes a dedicated boost gauge and an 8,000-rpm tachometer for the performance enthusiast. Modern comforts like air conditioning, cruise control, and power windows are all present and fully functional. The Delco cassette stereo includes a graphic equalizer, a high-end audio feature for the period. Every surface, from the leather-wrapped steering wheel to the carpets, shows the minimal wear of a 1,200-mile car. It even includes a serialized rear-seat armrest as part of the extensive accessory package.
Turbocharged V6 Power and Performance Specs
Under the hood lies the heart of the 1987 Buick GNX: a 3.8-liter V6 enhanced by McLaren Performance Technologies. This engine features a Garrett T3 turbocharger with a ceramic impeller and a significantly larger air-to-air intercooler. The factory conservatively rated the output at 276 horsepower and 360 lb-ft of torque to avoid upsetting Corvette owners. However, real-world testing often revealed numbers exceeding 300 horsepower and 400 lb-ft of torque. Power is sent to the rear wheels via a beefed-up Turbo-Hydramatic 200R4 four-speed automatic transmission. The rear suspension was completely redesigned with a Panhard rod and a unique longitudinal torque ladder bar. This setup allows the GNX to launch with incredible efficiency, achieving 0-60 mph in under 5 seconds. A high-performance dual exhaust system with low-restriction mufflers completes the mechanical package for maximum flow.
1987 Buick GNX Summary
The 1987 Buick GNX is more than just a fast car; it is a symbol of American engineering defiance. Number 447 is an exceptionally rare opportunity to own a nearly-new version of a one-year-only legend. Its low mileage and documented Illinois history make it a blue-chip investment for any performance car collection. The car includes rare memorabilia like the GNX-branded jacket and a scale model to complement its provenance. Maintenance has been kept current with a recent battery replacement and oil service performed in 2024. As the market for 1980s icons continues to grow, the GNX remains the gold standard for that decade. It provides a visceral driving experience that modern digital performance cars simply cannot match. This vehicle stands ready to serve as a centerpiece for a museum or a high-end private garage. It is a hauntingly beautiful reminder of when Buick ruled the American streets.
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Source: bringatrailer.com
