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The second-generation Chevrolet Volt has broken cover ahead of its official reveal at the Detroit Auto Show later this month.

The next-gen model was revealed at a private function in Las Vegas on the eve of the Consumer Electronics Show.

But after a quick tease, GM quickly put the car back under wraps and is refusing to reveal any more details until the North American International Auto Show, which kicks off on January 12.

SEE ALSO: Detroit Auto Show Preview

What is known about the car so far is that it will make use of a 1.5-liter 4-cyliner engine mated to a new Voltec extended range electric vehicle (EREV) propulsion system.

Chevy says the new engine should be 5 to 12 percent more efficient than the current car. Combined with a reduced curb weight, look for a noticeable improvement in fuel economy and an increase in electric range.

This is your first look at the redesigned 2016 Chevy Volt: http://t.co/IkwUKn7tXU pic.twitter.com/Ebx5sZSVx7 — The Verge (@verge) January 5, 2015

2016 Chevrolet Volt looks more aggressive than before. Official debut set for Detroit auto show. #CES2015 #CES pic.twitter.com/FceQ6nqfo0 — Matthew de Paula (@matthewdepaula) January 5, 2015

The very first look at the 2016 Chevy Volt doesn’t disappoint: http://t.co/PM0HcnyQOo pic.twitter.com/WFtoyd0utH — Gizmodo (@Gizmodo) January 5, 2015