The Chevrolet Colorado and its counterpart, the GMC Canyon, are General Motors' mid-size pickup trucks introduced in 2004 to replace the Chevrolet S-10 and GMC Sonoma. Isuzu, which participated in the design the truck, began selling a version of the truck in late 2005 named the "i-Series". The Chevrolet Colorado was jointly designed by GM's North American operations, GM's Brazil operations, and Isuzu, based on the GMT355, itself the basis for the GMT 345-based Hummer H3. The vehicles are manufactured and produced at a GM plant in Rayong, Thailand, and in Shreveport, Louisiana.