Question: GMC Terradyne was first unveiled to the public in an annual auto show held at which city ?

Context paragraphs:
LA Auto Show: The Los Angeles Auto Show is an annual auto show held at the Los Angeles Convention Center in mid-to-late November.  The LA Auto Show is an OICA sanctioned international exhibition and also endorsed by the Greater Los Angeles New Car Dealers Association.  It is open to the public for ten days each year, filling 760000 sqft of exhibit space.

First Hawaiian International Auto Show: The First Hawaiian International Auto Show is an annual auto show held every year between the middle week of March and the first week of April in Honolulu, Hawaii.  The event takes place at the Hawaii Convention Center (near the Ala Moana Center), whose location site was once the location of a Chevrolet dealership, Aloha Motors.  The event, affiliated with the "Motor Trend" regional auto show circuit since 2000, is produced by the Hawaii Automotive Dealers Association (HADA) and sponsored by First Hawaiian Bank, with the "Honolulu Star-Advertiser" serving as the media sponsor.  The next event, going into its 39th year, will be held March 24-26, 2017.

Philadelphia Auto Show: The Philadelphia Auto Show, also known as the Philadelphia International Auto Show is an annual auto show held in late January and early February in Philadelphia, Pennsylvania at the Pennsylvania Convention Center.  The 2017 Philadelphia Auto Show is January 28-February 5.

GMC Terradyne: The GMC Terradyne was a concept truck made by GMC in 2000, designed for heavy industrial use.  It was first unveiled to the public at the 2000 North American International Auto Show.  One of its notable features was an onboard 5000 watt generator, which was said to put out enough power to operate an entire house.

Geneva Motor Show: The International Geneva Motor Show (French: "Salon international de l'automobile" ) is an annual auto show held in March in the Swiss city of Geneva.  The show is hosted at the Geneva Palexpo, a convention centre located next to the Geneva Cointrin International Airport.  The Salon is organised by the Organisation Internationale des Constructeurs d'Automobiles, and is considered an important major international auto show.

Washington Auto Show: The Washington Auto Show (WAS) is an annual local auto show held in Washington, D.C. at the Walter E. Washington Convention Center usually in late January.  It is among the largest auto shows in North America, trailing only the North American International Auto Show in Detroit (NAIAS), the LA Auto Show, the New York International Auto Show (NYIAS) and the Chicago Auto Show in size.  It is sometimes also referred to as the D.C. Auto Show.  The event has evolved to emphasize and showcase the latest innovations in sustainable automotive technologies.  Since 2008 the winners of the Green Car Vision Award are announced during the show.

Memphis International Auto Show: The Memphis International Auto Show is an annual auto show held every January in Memphis, Tennessee.  The event takes place at the Cook Convention Center in Downtown Memphis and is affiliated with the "Motor Trend" regional auto show circuit.  Despite the event's title name, not all vehicles or automakers are featured due to the limited convention space.  Although the event is opened to visitors in the greater Memphis area, including residents from Arkansas and Mississippi, it is mandated at all auto shows in Tennessee that under state law, no sales may take place on the premises, and signs to that effect must be posted.  The 2016 event took place from January 8–10.

Montreal International Auto Show: The Montreal International Auto Show ("Le Salon International de l'Auto de Montréal" in French) is an annual auto show held in for 10 days in mid-to-late January in Montreal, Quebec, Canada.  It usually takes place at the Palais des congrès de Montréal.

Greater Milwaukee Auto Show: The Greater Milwaukee Auto Show is an annual auto show held every year between late February and early March in Milwaukee, Wisconsin.  The event takes place at the Wisconsin Center in Downtown Milwaukee, and is affiliated with the "Motor Trend" regional auto show circuit.  The Automotive Dealers Association of Mega Milwaukee (ADAMM) serves as the primary producer, sponsor and owner of the event, with the "Milwaukee Journal Sentinel" serving as the media sponsor.  Prior to the events, an auto show gala is held the day before the main show is opened to the public.

North American International Auto Show: The North American International Auto Show (NAIAS) is an annual auto show held in Detroit, Michigan at Cobo Center, usually in January.  It is among the largest auto shows in North America.

Supporting paragraphs: GMC Terradyne North American International Auto Show
Answer: Detroit, Michigan