The new Cadillac sedan is due in 2010 for the 2011 model year and its design is close to being finalized with only the car’s front-end still being worked over, reports Motor Trend. The new merged Sigma-Zeta platform will come in three flavors and all with forged aluminum suspension for a premium road-feel and better handling. The trio will include a shorter ‘Coupe Premium’ design earmarked for the next-gen CTS coupe, a ‘Midsize Premium’ for the next-gen CTS and a ‘Large Premium’ for the new STS-DTS replacement.
GM is also working on a third RWD platform for a range of new small sedans including a new Cadillac rival for BMW’s 3-series that’s aimed at European markets. A non-premium version of this platform is expected to spawn vehicles for Holden, Pontiac and Chevrolet.
The next-gen Chevrolet Impala won’t be getting a RWD platform. It will likely feature a stretched version of the FWD Epsilon II platform that debuted in the new Opel Insignia and will also appear in the next-gen Buick LaCrosse.