The Auto Car Sport

General Motors has announced it is currently working on its fullsize SUV replacements. A Lambda based Cadillac will go into production to compliment the new Escalade, not replace it.
On February 13, 2010 according to a report on Autoblog.com, GM has reissued a redesign on the GM fullsize SUV lineup, including the Escalade, for a 2013 release due to increased SUV sales.

Cadillac Escalade