The first Chevrolet pickup truck appeared in 1918. The buyer provided the all-wood cab or got it after an aftermarket supplier added it to the chassis. The same was true for the steel cargo bed.. "C" indicated two-wheel drive and "K" indicated four-wheel drive. The aging C/K light-duty pickup truck was replaced with the Chevrolet Silverado and GMC Sierra names in 1999 in the US and Canada. In 2001 in Brazil they were called the Chevrolet Silverado HD and GMC Sierra HD heavy-duty pickup trucks. Until this time the names Silverado and Sierra were used to identify the trim level of the C/K trucks.