sentences:  Once sketches were finished, the Camaro was constructed as a clay model which was complete by fall 2005 and was shown to the public in early 2006.After the public introduction of the concept cars, Chevrolet started constructing several camouflaged test mules of the Camaro which were manufactured by Holden costing about US$250,000 each.These vehicles were used for crash testing, test driving, and to handle extreme weather conditions such as in Canada, Arizona, and Australia.