CHICAGO General Motors
Co. engineers have incorporated high-strength steel (HSS) in
the frame and cab structure of the 2014 Chevrolet Silverado
"We chose high-strength steel
for the key structural elements of the 2014 Silverado, (which)
reduces the weight of these components without sacrificing the
toughness and durability customers count on," executive chief
engineer Jeff Luke said in a statement.
Key elements of the
frameincluding the main rails and major cross
memberswill be made from HSS, while hydroforming will
improve strength and reduce the mass of the front of the frame.
HSS also is being incorporated into the A-pillars, B-pillars,
roof rails and rocker panels, and ultra-high-strength steel
will be used in areas of the rocker panels and underbody in
anticipation of new crash tests.
In all, about two-thirds of the
cab structure will be made from high-strength steel,
Detroit-based GM said.
The 2014 Silverado 1500 will
feature a roll-formed steel pickup box that is lighter,
stronger and more durable than traditional stamped steel boxes,
the automaker said.
Aluminum will be used in some areas to reduce mass. The
blocks and cylinder heads of all three EcoTec3 engines will be
made of cast aluminum, while four-wheel-drive crew-cab models
will use forged aluminum upper-front control arms and cast
aluminum lower control arms and steering knuckles for a
reduction of 42 pounds. The hoods also will be aluminum, saving
17 pounds over a comparable steel panel, GM said.