A division of GM, GMC, has redefined what it means to be a truck company. Previously focusing heavily on pickup and heavy-duty trucks, GMC expanded its lines to include SUVs and vans. Still, GMC has become the reliable go-to brand for a work vehicle. The GMC brand is known for its premium engineering and power, so you can confidently tow in your 1973 GMC K25-Or-K2500-Suburban .