The exhaust note is unique to the Sabre GT, and it shares its horn with the Sabre. Because of the minor torque deficit, it's a bit harder to get the Sabre GT to spin both its wheels on dry tarmac. The engine is comparable to a Dukes in horsepower, but with slightly less torque, allowing for fast acceleration with the wheels seldom breaking loose under full throttle. There are several iterations of the Sabre GT, but these are cosmetic in nature: some feature a plain hood, others feature a cowl (reverse) scoop on the hood for the air filter with a 'TURBOCHARGED' badge on either side, and some feature a more aggressive forward-facing scoop on the hood, which also has steel quick-release pins to keep the hood from flying off under high speed. '550ci' decals are featured on the boot lid, front fenders and on the hood stripes. The engine is a turbocharged 550 cubic inch (9 liter) V8, and it definitely sounds like it, with the turbo whistle evident at higher RPM. Sabre GTs may also appear with a hood bulge or a large hood scoop with visible hood clips and wires.

Side stripes with 'Sabre Turbo' labels are also featured on the lower sides of the car, just in front of the rear wheels. The stripes featured on some Sabre GTs look much like the ones on the Sabre Turbo, except the stripes do not continue all the way down the hood to the front of the car. The Sabre GT has a different Declasse logo than the makers other cars, being an older design, a circle with 'Declasse' written around the inside edge. Overall, the look created emulates the GM big body V8 coupes of the early 70's (Cutlass, Skylark, Chevelle). The different hood scoop on some Sabre GTs resembles that of a 1968 Shelby Mustang, while some resemble the 442 Cutlass. The paintjob seems to look like that of a Mustang Mach 1 with some characteristics of a Shelby Mustang. The wheels appear to be based on those found on Pontiac Firebirds during the 1970's. The back and sides resemble a 1970 Oldsmobile Cutlass - but the sides have softer lines and could be from '68/'69 Chevrolet Chevelles, the grille has a resemblance to a 1970 AMC Rebel, the front is similar to a 1970 Buick GSX (the headlights and the shape of the bumper is also very similar to a 1970 Cutlass) and the front bumper's round turning signals are similar to a 1968 or 1969 Dodge Coronet.

Considered a successor to the Sabre Turbo from Grand Theft Auto: Vice City and Grand Theft Auto: Vice City Stories, the Sabre GT borrows bits and pieces from various American muscle cars.

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