The GMC Syclone Was the Ultimate American Sleeper of the 90s –

From the March 1991 issue of Road & Track.

Call it a 2-door coupe along with a large, open trunk. Call it an avatar of Buick’s GNX. Call it an automotive contradiction—a truck that might never ever haul cargo. However simply don’t call the Syclone slow.

General Motors’ attempt to enhance its light truck image is an interesting combination of old-design hot rod along with dollops of brand-new technology applied to the issues inherent in the stock chassis. Rear drive was scrapped for all-wheel drive in an at­ draw to translate a few of the torque made by the turbocharged engine to acceleration very compared to simply a smoky, tire-squealing melee that gradually leads nowhere fast.

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As drag-strip times indicate, this reduced 4×4 can easily launch from a green light and preserve up along with simply regarding anything on a straight street, hitting 60 mph in 4.9 seconds. Step on the gas and the truck takes a specified as all of four tires dig in along with a minimum quantity of wheelspin.

Ron Sessions

Power is given by a 90-degree 4.3-liter pushrod V6. A Mitsubishi turbocharger along with a liquid-cooled focus bearing and air-to-liquid intercooler for the consumption charge are added to the engine. Pistons, personal port fuel injectors and the throttle physique are borrowed from the L98 Corvette V8. The result—along with a optimum of 14 psi of enhance allowed by the Delco computer—is attention-obtaining go.

A transfer case borrowed from the Astro van and a modified 700R4 transmission from the Corvette transmit Energy to the ground. Torque is split 35 percent front, 65 percent rear on dry pavement. The unique Firestone V-rate rated, all­ season tires were produced especially for this machine.

As you would certainly anticipate from a truck along with 64 percent of its weight on the front tires, understeer is pronounced throughout difficult cornering. And despite the fact that the spring speeds and anti-roll bar of the rear axle have actually been modified, axle tramp appears once traversing uneven road surfaces. Still, the all-wheel drive offers a confidence-inspiring degree of stability throughout a lot of driving conditions.

Ron Sessions

The subdued exterior is made to deny that this is one quick machine, as confounded ZR-1 owners may find out the difficult way. Inside, there’s an instrument panel from a turbocharged Sunbird along with easy-to-read analog gauges. The bucket seats have actually added thigh sustain and bigger edge bolsters. Air conditioning, tinted glass, stereo cassette, focus console, tilt steering and power-actuated windows and locks round out the package.

Production takes position at GM’s Shreveport, Louisiana plant. Partially completed trucks are delivered to a Triad facility next door, which modifies the engine by including the turbocharger, consumption system and in­tercooler and plumbing, too as assorted exterior and interior pieces. GMC expects to sell in between 2500 and 3000 Syclone models per year, each along with a rate tag of $25,500. And they are expected to be in sufficient supply to discourage dealer gouging, as an additional 50 or 60 a day can easily be produced.

Oh, in case you’re wondering what’s under the tonneau cover in back—the pickup bed can easily hold 500 lb. of cargo.