49k-Mile 1987 Buick GNX

Description

The 1987 Buick GNX is the ultimate evolution of Buick’s turbocharged legacy—an icon of stealth performance and engineering collaboration between Buick and ASC/McLaren. This example, GNX #244 of 547 produced, shows 49,669 miles and is said to remain largely original with period modifications to enhance its performance without compromising its heritage.

Finished in black over a gray cloth interior, the seller claims GNX #244 retains its original engine, body, paint, wheels, suspension, and interior components. It’s accompanied by documentation including the original sales paperwork, window sticker, owner’s manual, service records, and the numbered hardcover GNX book. A custom GNX jacket, matching floor mats, and hood liner—all numbered #244—add to its collector appeal.

Claimed garage-kept since 2007 and driven fewer than 5,000 miles in that time, the seller states this GNX runs and drives well, with modifications primarily focused on performance and reliability. All original parts (except the exhaust) are reportedly included, preserving its authenticity.

Highlights

• GNX #244 of 547 produced 

• 49,669 miles

• Powered by a 3.8-liter turbocharged OHV V6 engine paired to a four-speed automatic transmission 

• Garage-kept since 2007 with under 5,000 miles driven

• Clean CARFAX Vehicle History Report 

Features

• Performance Upgrades: 

  • PT62 larger turbocharger with 3-inch downpipe and external wastegate 

  • Maximum Flow remote high-performance oil filter kit (+1 qt capacity) 

  • Art Carr 4R transmission pan and shift kit (+1 qt trans fluid capacity) 

  • Applied Technologies 2.5-inch stainless steel exhaust and mufflers 

  • Stainless steel front brake lines and upgraded rear brake shoes 

  • Aluminum alternator and water pump pulleys 

  • Billet aluminum horn ring and shifter handle 

  • Stainless alternator and wiper motor covers 

  • Torque straps and under-hood brace kit 

  • Billet adjustable fuel pressure gauge 

  • Black aluminum mass air flow pipe 

  • Control arm bushing heat shield 

  • High-performance plug wire set 

  • Mystery theft deterrent system 

  • TPS-TEC throttle enhancer 

  • Hi-Low coolant fan switch 

  • Heated oxygen sensor kit 

  • Intercooler air scoop 

  • GM coil pack 

  • Ram air kit 

• Interior & Cosmetic Enhancements: 

  • Custom GNX floor mats and hood liner (#244) 

  • Custom GNX jacket (faded but included) 

  • Painted and replaced bumper fillers 

  • Custom Armrest matching interior 

  • Console ashtray switch plate 

  • Replaced gas hood shocks 

  • Window anti-rattle kits

  • D/S A-post gauges

  • Headliner replaced

Known Imperfections

• Brake fluid damage on master cylinder due to fluid reservoir changeout

• SMC alcohol injection system (non-operational, partially removed in 2014) 

• A possible repair to the passenger-side front wheel well is noted by the seller

• Cracking on passenger-side rubber window seal

• Windshield washer system inoperable

• Some front-end components show wear 

• Hood liner has some insulation damage 

• Pitting on driver side headlight housing 

• Driver’s exhaust manifold cracked 

• Power antenna motor belt inoperable 

• Some staining on trunk carpet 

• A/C does not blow cold 

• Some paint chips on rockers and in other areas

Included 

• Original sales paperwork, window sticker, and owner’s manual 

• Numbered GNX hardcover book (#244) 

• Buick GNX jacket (#244) 

• Trophies from past car chow appearances 

• Service records and ownership history 

• Buick Service Manuals Volumes 1 & 2 

• Original parts (except exhaust)

• Spare wheel and jack 

• Two sets of keys 

Ownership History

The accompanying CARFAX Vehicle History Report places this 1987 Buick GNX in York, Pennsylvania. The seller states this GNX has been garage-kept since 2007 and driven sparingly. The clean CARFAX report confirms its mileage and history, making GNX #244 an appealing example of Buick’s legendary turbocharged coupe.