The Geo Storm was a rebadged version of the sporty Isuzu Impulse minus some of that car's more expensive features. The Storm and the Impulse were sold in Japan as the PA-Nero and related Gemini Coupe. The Storm lacked the Impulse's Lotus-tuned suspension as well as the Impulse's optional turbocharger and all-wheel drive drivetrain. Although they were essentially the same car, sales of the Storm were much stronger than those of the Impulse—indeed, the Storm sold better than most small GM cars of that era. Slow sales of the Isuzu version doomed the Storm as when the Isuzu Impulse was canceled, the Geo Storm derivative had nothing to be built from, meaning both cars were discontinued in 1993.
The Storm was manufactured at Isuzu's main plant in Fujisawa, Kanagawa, Japan. The Storm and Impulse was sold in Canada by GM as the Asüna Sunfire.
The most common body style for the Storm was a three-door hatchback. The 1990 and 1991 hatchbacks were produced in two trim packages, but all Storms shared front disk and rear drum brakes and had an anti-sway bar to tighten the front suspension. The base model was priced at $10,390, and the GSi was $11,650.USD