The 2008 GMC Denali XT Concept

The 1992 Pontiac Salsa Concept

The 2000 GM Precept

The Precept concept demonstrates an ultra-high-efficiency, environmentally friendly architecture from GM.

The parallel-hybrid Precept concept employs the most aerodynamically efficient design known,

with a drag co-efficient of 0.163. Its four-wheel drive, dual-axle configuration features a 35 kilowatt

three-phase electric motor driving the front wheels, and a lean-burn compression-ignition,

direct-injection heat engine driving the rear wheels

The 1992 GM Ultralite

Developed jointly by General Motors Design Center and Research Laboratories,

the Ultralite concept was created to be the ultimate test-platform for fuel economy.

The four-passenger vehicle features a carbon fibre monocoque structure that combines

high-strength with exceptional weight savings. Due to efficient packaging techniques

and use of lightweight materials throughout, Ultralite's curb weight is a mere 1,400 pounds.

The concept also incorporates low rolling resistance tires and a 1.5-litre, three cylinder,

two-stroke engine that delivers 111 bhp at 4500 rpm. Fuel economy is EPA rated at 80 mpg (highway).

The 1991 GM HX3 Hybrid Van

The 1982 GM Aero 2000

The GM Aero 2000, one of the most aerodynamic automobiles ever developed,

was unveiled in 1982 at the Epcot Center World of Design display.

The experimental four-seater featured sliding doors,

front wheel skirts top-hinged for access to wheels and tires,

and a speed-regulated rear foil to reduce fuel-costly air turbulence.

Many of the design concepts are evident in GM's electric car, EV1.

The 1965 GM-X Stiletto

The GM-X Stiletto was an advanced, high-performance car with styling strongly influenced by

aerospace design.

It featured aircraft-type steering, a maintenance monitoring system with toggle switch controls,

and a three-way

speaker system for inside/ outside communications. It also debuted at the 1964 New York World's Fair.

The 1964 GM Runabout

The experimental small commuter car Runabout was unveiled at GM's Futurama at the New York World's Fair in 1964. A three-wheel hatchback, Runabout carried two passengers and had ample storage room.