Power comes from a 455ci V8 that is backed by a TH400 three-speed automatic transmission.
Power comes from a 455ci V8 with the optional Stage 1 performance package, which featured a revised cam profile, raised compression from 10.0:1 to 10.5:1, and increased output by 10 horsepower for a total of 360 horsepower and 510 lb-ft of torque.
Induction is through a Rochester Quadrajet four-barrel carburetor.
The engine was rebuilt in 2019 by VanGordon Racing Engines.
A numbers-matching three-speed Turbo Hydra-Matic 400 automatic transmission sends power to the rear wheels through a 10-bolt Positraction limited-slip axle.
A total of 678 examples of the GSX were built.
This car is Saturn Yellow (Q-Q)—one of only two available colors—and it was refinished with lacquer paint approximately 15 years ago.
Buick Rallye wheels measuring 15×7″ are mounted on Goodyear Polyglas GT tires.
The GSX’s standard Rallye Ride Control suspension features a rear stabilizer bar, firmer shocks and springs, and a rear lower control-arm assembly.
Power-assisted braking is enabled by vented discs in front and finned drums at the rear.
The cabin is trimmed in black vinyl over the front bucket seats as well as the rear bench, with woodgrain trim on the dashboard and the center console.
Additional features include deluxe armrests, rear courtesy lamps, black lap belts for five occupants, and a Sonomatic radio.
Instrumentation includes a 120-mph speedometer in between a Rallye clock and gauges for monitoring fuel level, oil pressure, amperage, and coolant temperature.
The five-digit odometer shows just under 1,100 miles, true mileage is unknown.
