GM plans to unveil a massive diesel truck concept during the North American International Auto Show in Detroit.
The Sierra All Terrain HD concept truck is a blend of luxury and strength.
It's built for off-roading, sits very high on its suspension for active work or lifestyle.
Refinements include a lighted retractable step and a built-in locking toobox.
The vehicle also features 20-inch wheels, 35-inch tires, racing shocks.
The Sierra All Terrain HD is a concept but depending on reactions at the auto show, you may see it go into production.