This 1987 Buick GNX was purchased new from Richard Buick, Inc. in Newtown Square, Pennsylvania and shows just 3k miles. Power is from a turbocharged 3.8-liter V6 paired with a four-speed automatic transmission and a limited-slip differential. Factory features include a two-tone cloth interior, a GM-Delco AM/FM cassette radio, and air conditioning as well as a power driver’s seat and power windows. The selling dealer acquired the car from the original owner after it was listed on BaT in June 2019. This GNX is now offered in New Hampshire with its window sticker, owner’s manual and booklets, memorabilia, an accident-free Carfax report, and a clean Pennsylvania title.

The Grand National Experimental was made in partnership with ASC McLaren and features an upgraded powertrain, suspension, and instrumentation compared with the Regal Grand National on which it was based. The body is finished in black and features heat-extracting vents, fender flares, and a three-piece rear spoiler. The seller notes that the plastic bumper surrounds are faded and cracked, and a section of black tape has been added under the rear license plate.

Factory black 16″ cross-lace wheels are equipped with GNX-branded center caps and are mounted with staggered-width Goodyear Eagle VR50 tires, which the first owner stated are original to the car.

The interior is trimmed in Black and Sand Gray cloth with black carpeting and embroidered logos on the headrests. Air conditioning was included in the WE2 Grand National package, and additional options include power windows as well as a GM-Delco AM/FM cassette radio. The seller notes that the headliner has started to detach, as shown in the photo gallery below.

The GNX was equipped from the factory with a revised instrument cluster consisting of Stewart Warner analog gauges. A plaque mounted to the passenger side of the dashboard indicates that this car is #428 of the 547 GNX models produced.

The five-digit odometer shows just over 3k miles, about a dozen of which have been added by the selling dealer. The power antenna is inoperative.

The turbocharged 3.8L V6 featured a Garrett T3 turbocharger, a larger intercooler, and a low-restriction exhaust, and it was rated at 276 horsepower and 360 lb-ft of torque when new. Power is sent rearward through a Turbo-Hydramatic 200R4 four-speed automatic transmission equipped with a larger oil cooler. The selling dealer reportedly changed the car’s fluids. Per the seller, a leak is present on the rear main seal, and the hood struts are in need of replacement.

Numerous photos of the undercarriage are provided in the gallery below.

GNX apparel and literature are included in the sale and shown further in the gallery. The window sticker shows delivery to Richard Buick in Newtown Square, Pennsylvania along with factory options and specifications.

The October 2019 Carfax report contains two entries and shows no history of accidents or other issues. A narrated walk-around video is attached below.