IN 1986 Buick partnered with McLaren Performance Technologies/ASC to produce a tupercharged version of the Grand National. With a Garrett T-3 turbocharger, more than 300 bhp was realized.
Along with the package came a larger ceramic coated intercooler, high-low exhuast system, and a Turbo Hydramatic 200-R transmission. Suspension changes included a torque arm and Panhard bar for the rear axle as well as 16-inch alloy wheels all around.
Visually the GNX got the blacked out front grill of the Grand National and all the cars were sold in gloss black. An additional vent was placed on on the front fenders which is an identifying feature of the GNXs.
A limited production of only 547 cars were made and each was labeled with a plaque on the dashboard.
1987 Buick GNX – sold for $67,000 1987 Buick GNX #254 of 547. Includes all documents and books – Original window sticker. Original build sheet. Vehicle invoice. Original owner’s manual, GNX book. Original paint. Undercarriage has been meticulously detailed. Numbered GNX jacket. 10,400 original miles. Original Goodyear Eagle VR50 16 Gatorback tires. Officially in the GNX registry and Owner Association as a member of the Fortunate 547 Auction Source: Kissimmee 2014, #WhereTheCarsAre by Mecum
1987 Buick Regal GNX – sold for $79,750 One of only 547 built. Built by ASC/McLaren with Garrett turbocharging. Never road-registered, just 278 miles from new. Offered in virtually untouched, “time warp” condition. Auction Source: 2011 Monterey Auction by RM
Aside from its extreme rarity, this GNX is a very special example that has never been road-registered and shows just 233 miles from new. As offered, it remains in completely original and untouched, “time warp” condition, down to the factory-original audio system. Recently undergone a light recommissioning, being a delivery mileage car, the new owner will need to have the car checked before testing the GNX’s full performance and top speeds. On display since new at the Auto & Technik Museum in Sinseim, Germany, this GNX remains a great example of one of the fastest and most legendary American performance icons of the 1980s.
1987 Buick GNX 385 – did not sell for $60,000 One of only 547 produced, possibly only a few hundred left. All original. Only 10,000 miles. Stored in climate controlled show room. Original window sticker (on window). Auction Source: 2010 Mecum Kissimmee, FL Auction
Charlie Sheen Buick GNX. Over all excellent condition. 3 owners since new. Only 15,800 original miles as shown on title. Original drivetrain. Charlie Sheen was the second owner. He owned from 1991 to 1999. All documents included, copy of California title, auto tag registration and California tag. Checked throughout and serviced by KDK Performance a Grand National GNX specialist in Orlando, Florida. New Delco battery, synthetic oil change and hood shocks, etc One of only 547 produced. MSRP was $29,389, the GNX option added was $10,995 to the base price of the Grand National price