Question: What automobile manufacturer manufactures the Chevrolet Titan and sells pickup and commercial trucks, buses, vans, military vehicles, and sport utility vehicles?

Context paragraphs:
Marmon-Herrington: The Marmon-Herrington Company, Inc. is an American manufacturer of axles and transfer cases for trucks and other vehicles.  Earlier, the company built military vehicles and some tanks during World War II, and until the late 1950s or early 1960s was a manufacturer of trucks and trolley buses.  Marmon-Herrington had a partnership with Ford Motor Company, producing trucks and other commercial vehicles, such as buses.  The company may be best known for its all-wheel-drive conversions to other truck maker's units, especially to Ford truck models.  Founded in 1931, Marmon-Herrington was based in Indianapolis, Indiana, with a plant in Windsor, Ontario, and remained in Indianapolis until 1963.  It is now based in Louisville, Kentucky.

List of sport utility vehicles: This page lists sports utility vehicles currently in production (as of 2013) as well as past models.  The list includes crossover SUVs, Mini SUVs, Compact SUVs and other similar vehicles.  Also includes hybrid, luxury, sport or tuned, military, electric and fuel cell versions.  Due to confusion , Sport Utility Trucks are also in this list.

Chevrolet Suburban: The Chevrolet Suburban is a full-size, extended-length sport utility vehicle from Chevrolet.  It is the longest continuous use automobile nameplate in production, starting in 1935 for the 1935 U.S. model year, and has traditionally been one of General Motors' most profitable vehicles.  The Suburban has been produced under the Chevrolet, Holden, Plymouth and GMC marques until the GMC version was rebranded as the GMC Yukon XL.  For most of its recent history, the Suburban has been a station wagon-bodied version of the Chevrolet pickup truck, including the Chevrolet C/K and Silverado series of truck-based vehicles.  Cadillac offers a version called the Escalade ESV.

Pars Khodro: Pars Khodro (Persian: پارس‌خودرو‎ ‎ ) is an Iranian automobile manufacturer.  It was the first manufacturer of sport utility vehicles (SUVs) in Iran.

Laffly: Laffly was a French manufacturer of trucks and utility vehicles.  Founded in 1849, the Laffly company began manufacturing utility vehicles in Billancourt in 1912.  From the mid-1930s and until World War II, the company also manufactured a range of offroad military vehicles such as the Laffly S15 and Laffly V15.

Chevrolet Titan: The Chevrolet Titan and GMC Astro are heavy-duty (Class 8) cabover trucks that were manufactured by the GMC Truck and Coach Division of General Motors.  The largest cabover trucks ever produced by GM, the Titan (and more common Astro) were introduced for 1969, replacing the 1960-1968 GMC "Crackerbox" COEs.  The Astro and Titan would become the final trucks of the type assembled and marketed by General Motors, following the 1981 exit of Chevrolet from heavy truck sales and the 1986 creation of the Volvo GM joint venture.

Commer: Commer was a British manufacturer of commercial vehicles from 1905 until 1979.  Commer vehicles included car-derived vans, light vans, medium to heavy commercial trucks, military vehicles and buses.  The company designed and built its own diesel engines for its heavy commercial vehicles.

Nankang Rubber Tire: Nankang Rubber Tire Corp., Ltd.(南港輪胎股份有限公司 in Chinese language) manufactures automobile tires and other synthetic rubber products.  The company's products include locomotive tires, and tires for light trucks, sedan cars, sport utility vehicles and snowfield-use vehicles.  During the year ended December 31, 2006, the company obtained approximately 99% of its total revenue from the automobile tires business.  In 2006, the company obtained approximately 35% and 32% of its total revenue from the Americas and Europe, respectively.

GMC (automobile): GMC (General Motors Truck Company), formally the GMC Division of General Motors LLC, is a division of the American automobile manufacturer General Motors (GM) that primarily focuses on trucks and utility vehicles.  GMC sells pickup and commercial trucks, buses, vans, military vehicles, and sport utility vehicles marketed worldwide by General Motors.

Foton Motor: Beiqi Foton Motor Co., Ltd. (Foton Motor or Foton) is a Chinese company which designs and manufactures trucks, buses, sport utility vehicles and agricultural machinery.  It is headquartered in Changping, Beijing and is a subsidiary of BAIC Group.

Supporting paragraphs: Chevrolet Titan GMC (automobile)
Answer: GMC