Underneath, the Silverado rides on a fully boxed high-strength steel frame with hydroforming technology; truck cab's frame is built with high strength steel as well. The third generation Silverado uses aluminum on the hood, for the engine block and for the control arms in order to save mass. The truck's bed is made of roll-formed steel instead of stamped steel used by other manufacturers in order to save weight and gain strength. The third generation Silverado introduced the all-new upmarket top-of-the-line "High Country" trim level which includes saddle brown leather interior, which is Chevrolet's first entry into the luxury truck market. A fully-squared front end takes styling cues from the 1994–1998 C/K trucks, and, on Z71 models, a Z71 badge was added to the front grille. The first production Silverado completed assembly on April 29, 2013. The Silverado 1500 went on sale in May 2013 as a 2014 model, with the Silverado HD being available in early 2014 for the 2015 model year. On January 10, 2014, a recall was issued for 370,000 Silverado and Sierra pickups due to a fire risk. The American model version of the 2014 Chevrolet Silverado 1500/2500HD/3500HD and the 2015 Chevrolet Silverado High Country was introduced to the Philippines market by Chevrolet Motorama Show late November 2014 as a MY2015, along with the MY2015 Chevrolet Suburban, 2015 Chevrolet Tahoe, 2015 Chevrolet Impala, 2015 Chevrolet Express Van, 2015 Chevrolet Trax and 2015 Chevrolet Colorado. On January 14, 2014, The Silverado, along with the Chevrolet Corvette Stingray, received the 2014 North American International Auto Show's Car and Truck of the Year awards. For 2018, this generation of Silverado was officially exported to Australia and converted to the right-hand-drive and Australian Design Rules (ADR) by General Motors Australian subsidiary, Holden Special Vehicles (HSV). In the past, several independent specialists imported and converted Silverado and GMC Sierra for Australian and right-hand-drive markets. The 2500HD and 3500HD were fitted with 6.6-liter/litre Duramax diesel V8, the sole engine choice for Australia. No 1500 version was offered. 2015 For the 2015 model year, the 6.2L EcoTec3 was paired with the new 8-speed 8L90 transmission, offering a wider ratio spread with more closely spaced gears, quicker shifts, improved acceleration, and fuel economy. The Silverado 2500HD/3500HD models continue to use the 6.0-liter L96 flex fuel capable Vortec engine combined with the 6L90E transmission, installed with engine oil and transmission fluid coolers for hauling/towing applications.