This 1987 Buick GNX is #450 of 547 produced for a single model year, and it now shows 30 miles following its July 2024 sale on BaT and subsequent acquisition by the selling dealer. The car is powered by a turbocharged 3.8-liter V6 paired with a four-speed automatic transmission and is finished in black over two-tone black and Sand Gray upholstery. Details include a limited-slip differential, 16″ cross-lace wheels, composite wheel arch flares, fender vents, a rear spoiler, air conditioning, and cruise control. This GNX is now offered by the selling dealer in Texas with manufacturer’s literature, memorabilia, window sticker copies, a clean Carfax report, and a clean California title.
The Grand National Experimental was created in partnership with McLaren Performance Technologies/ASC to celebrate the end of the vehicle’s production run, and all 547 examples were finished in black. Cosmetic details specific to the GNX include heat-extracting fender vents, composite wheel arch flares, a three-piece rear spoiler, and GNX badging. The car also has a rear window defogger, sport mirrors, and dual exhaust outlets.
The GNX features front suspension components from the contemporary Grand National, and upgraded rear components include a Panhard rod, torque arm, and an additional frame crossmember. Braking is handled by power-assisted front discs and rear drums.
Black-finished factory 16″ cross-lace wheels wear GNX-branded center caps along Goodyear Eagle VR50 tires.
The front bucket seats and rear bench are upholstered in black and Sand Gray cloth, and Turbo 6 embroidery adorns the front seat headrests. Amenities include a power-adjustable driver’s seat, air conditioning, cruise control, power windows, and a Delco cassette stereo with a graphic equalizer.
A plaque mounted to the passenger side of the dashboard identifies this as GNX #450.
The three-spoke leather-wrapped steering wheel fronts GNX-specific Stewart-Warner instrumentation consisting of a digital speedometer, an 8k-rpm tachometer, and gauges for boost pressure, oil pressure, coolant temperature, and fuel level. The five-digit odometer shows 30 miles.
The 3.8-liter V6 was modified by ASC/McLaren with a Garrett T3 turbocharger under a heat shield with GNX lettering along with a larger air-to-air intercooler and a low-restriction exhaust system. Factory-rated output was 276 horsepower and 360 lb-ft of torque.
Power is sent to the rear wheels through a 200R4 four-speed automatic transmission with a factory-upgraded oil cooler, and the limited-slip differential features a GNX-branded aluminum cover.
The Carfax report is free of accidents or other reported damage.