Pontiac introduced a sportvan concept vehicle called the Montana Thunder at the 1998 North American International Auto Show. The vehicle is aimed at SUV and minivan owners looking for power, style, and speed. In other words, it's like a minivan but too small, and like a sport-utility vehicle but with front-wheel drive.

A 220-horsepower 4.0L V-6 engine with Ram Air induction powers the Thunder. John Mack, lead designer on the project, told journalists assembled for the unveiling that the vehicle is shorter, lower, and wider than the regular-wheelbase Trans Sport minivan currently sold in showrooms.

The Thunder is a solid concept exercise featuring plenty of interesting features like front and rear activity lamps, a built-in bike rack for the tailgate, a pop-out trailer hitch, a gauge cluster that tilts with the steering wheel, a removable center console with portable TV set, and mesh see-through seat upholstery.