Originally Posted by rodgerdodger
So it would make sense to move Malibu to the SWB (Regal) platform and the next Impala to the LWB (LaCrosse) platform, leaving room for the RWD Caprice at the top of the line.
My understanding is that the upcoming Impala and Lucerne will share platforms with the 2012 Cadillac XTS (Super Epsilon). The Cadillac will be available in AWD only, while the Chevy and Buick versions will be FWD.
The RWD Caprice will be assembled in Australia and will be imported exclusively for police use.
The upcoming Malibu, Regal and LaCrosse will all be based on the Epsilon-II platform, except the LaCrosse will be LWB.
The Malibu will also be re-badged as Chevy/Holden Epica and Daewoo Tosca for foreign markets (with minor changes such as bumpers and tail lights).
So pretty much all mid to full-size GM sedans will share in common the Epsilon-II/Super Epsilon platform. There's indication that a Super Epsilon sedan will be built and sold in Australia as a full-size Holden (which is currently in development in Australia). So there's a possibility that the RWD Caprice/Calais/Commodore will eventually be dropped in favor of an AWD Super Epsilon sometime in the future.