The Chevrolet Colorado, and its counterpart, the GMC Canyon, are series of compact and later mid-sized pickup trucks marketed by American automaker General Motors. They were introduced in 2004 to replace the Chevrolet S-10 and GMC S-15/Sonoma compact pickups. It is named for the U.S. state of Colorado. First generation (2004) The Chevrolet Colorado and its twin, the GMC Canyon were jointly designed by GM's North American operations, GM's Brazil operations, and Isuzu, which began selling its own version worldwide in 2002. In late 2005, Isuzu offered a version in North America called the Isuzu i-series. This North American model Isuzu shared North American powertrains, styling, and equipment with the Colorado/Canyon twins and differed from Isuzu's worldwide offering. All Chevrolet, GMC, and Isuzu versions worldwide are based on the GMT355, itself the basis for the GMT 345-based Hummer H3. Most vehicles for markets outside North America are manufactured at a GM plant in Rayong, Thailand. All North American-market vehicles were manufactured by Shreveport Operations. The cooperation between GM and Isuzu to build a light-duty truck and offer it in North America returns to an original arrangement the two companies had in the 1970s with the Chevrolet LUV, a rebadged Isuzu Faster. Markets North America The Colorado/Canyon trucks in the North American market offer both manual and automatic transmissions. GM also offers either a rear-wheel drive (4x2) or four-wheel drive (4x4) drivetrain with standard, extended, and four-door crew-cab body styles. Most models come with the LK5 I4 engine as standard, but a more powerful 3.5 I5 comes with the Z71 package on four-door versions and is optional on all others. The 4-door Z71s also get the four-speed automatic transmission standard. This package was later dropped in favor of LT2 and LT3. The Colorado was offered in three basic trim levels: Base, LS, and LT, while the Canyon was also offered in three trim levels, but with different names: Canyon, SLE, and SLT. Three different cab configurations were offered on Colorado and Canyon: a two-door regular-cab model with a box and seating for either two or three passengers, a four-door extended-cab model with a box and seating for either four or five passengers, and a four-door crew-cab model with a shorter box and seating for either five or six passengers. Top trim levels in crew-cab configuration offered upscale features such as leather-trimmed seating surfaces, dual power-adjustable front bucket seats with lumbar support