GMC, formerly the General Motors Truck Company, or the GMC Truck & Coach Division (of General Motors Corporation), is a division of the American automobile manufacturer General Motors (GM) that primarily focuses on trucks and utility vehicles.
GMC currently makes SUVs, pickup trucks, vans, and light-duty trucks, catered to a premium-based market. In the past, GMC also produced fire trucks, ambulances, heavy-duty trucks, military vehicles, motorhomes, transit buses, and medium duty trucks.
While many GMC and Chevrolet trucks are mechanically similar, GMC is positioned as a premium offering to the mainstream Chevrolet brand, with luxury vehicles such as the Denali series and the electric, off-road Hummer EV series. 
In North America, GMC vehicles are almost always sold alongside Buick vehicles at joint dealerships, allowing the same dealer to market both upscale cars and trucks.