High Quality Content by WIKIPEDIA articles! The Chevrolet Sequel is a hybrid crossover SUV concept vehicle developed by General Motors and introduced at the 2005 North American International Auto Show. The Sequel is powered by a fuel cell powertrain, which includes an electronic control unit and a fourth-generation version of GM's fuel- cell stack. A fuel-cell is an electrochemical device that combines hydrogen fuel with oxygen from air to produce electricity. The only waste by-product of that conversion is water vapor. The Sequel became the basis for the design of the Chevrolet Traverse which is the replacement for the Uplander minivan, which is being phased out. The Sequel's fuel-cell stack has a rated power output of 73 kW (98 hp), supplemented by a lithium-ion battery pack rated at 65 kW. One 65 kW electric motor drives the front wheels and individual 25 kW wheel-motors (outboard of the rear brakes) drive each rear wheel, providing total tractive power of 115 kW.