CHICAGO Greater use of
aluminum is helping Cadillac reduce overall weight of its ATS
and CTS sedans, the luxury automaker said.
"By rethinking very traditional
elements, such as materials used for bumpers and doors,
we are able to save precious weight," CTS program engineering
manager John Plonka said in a statement.
The company, a subsidiary of
General Motors Co., said it cut 13.1 pounds by replacing CTS
steel bumpers with aluminum, 14 pounds by making front strut
towers of cast aluminum, 7.2 pounds by replacing cast magnesium
with extruded and stamped aluminum in the instrument panel
structure and 36.5 pounds by using extruded and cast aluminum
in the powertrain cradle, formerly produced with steel. For the
first time, all four doors will also be built with aluminum,
cutting 55 pounds compared with the steel doors on the previous
generation CTS, the company said May 9.
CTS also uses several grades of
advanced high-strength steel (AHSS) throughout the structure,
With a base curb weight of 3,600
pounds, CTS is the lightest vehicle in its class, Cadillac
Strategic use of aluminum also contributed to weight
reduction in the ATS luxury sport sedan, which shares
architecture with the new CTS sedan. The ATS powertrain
features extensive use of aluminum, including the hood,
suspension cradle and cylinder heads, the company said.