on the GM Theta platform shared with the Chevrolet Equinox. It replaced the Pontiac Torrent after the brand's demise. In 2020, General Motors announced the return of the Hummer nameplate, this time as a sub-brand of GMC instead of a stand-alone division. The Hummer lineup includes two models, an electric pickup truck and SUV, to be sold as the "GMC Hummer EV". According to GM, the Edition 1 production electric pickup truck will feature 1,000 horsepower, hit 60 mph in 3 seconds and is scheduled to launch in late 2021. The new Hummer EV was revealed on October 20, 2020. In 2022, the GMC brand was introduced in South Korea as a subsidiary of GM Korea. Platform sharing with Chevrolet Beginning in 1920, GMC and Chevrolet trucks became largely similar, built as variants of the same platform, sharing much the same body sheetwork, except for nameplates and grilles – though their differences, especially engines, have varied over the years. GMC advertising marketed its trucks to commercial buyers and businesses, whereas Chevrolet's advertising was directed towards private owners. Beginning in 1928, GMCs used Pontiac's 186 cu in six-cylinder engines in their lighter trucks. Medium-duty trucks relied on Oldsmobile straight-6 engines, while the heaviest trucks used GMC's own "Standard Big Brute" engine. From 1939 to 1974 GMC had its own line of six-cylinder engines, first the inline sixes known as "Jimmy's" from 1939 to 1959, and then their own V6 from 1960 until 1974, of which a V8 and a V12 version also existed. Additionally, from 1955 through 1959, the less than 2-ton, domestic GMC gasoline trucks were equipped with Pontiac V8s, and Oldsmobile V8s—whereas the Canadian models used Chevrolet engines. GMC dealerships were partnered with Pontiac, Oldsmobile and Buick dealerships. Between 1962 and 1972, most GMC vehicles were equipped with quad-headlights, while their Chevrolet clones were equipped with dual-headlights. The platform has been the most profitable for General Motors, as it was shared with the Chevrolet Blazer/GMC Jimmy, the Chevrolet Suburban and the Chevrolet Tahoe/GMC Denali. In 1998 the platform was introduced as the Cadillac Escalade. In 1971, GMC marketed their version of the Chevrolet El Camino, which was based on the Chevrolet Chevelle. Called Sprint, it was virtually identical to the El Camino, and a sport version, the SP, was equivalent to the El Camino SS. It was renamed Caballero in 1978, and remained produced alongside the El Camino until