Pontiac Grand Prix GTP
The Grand Prix was updated for 2004 on a revised version of the GM W platform. 2005 saw the high-end GXP trim as the successor for the now-defunct Bonneville. The first 2004 Grand Prix was built on May 5, 2003. A notable addition to the 2005 line is the GXP's small-block 5.3L V8, the Grand Prix's first V8 since 1987. With the closing of the Oshawa plant that produces the car in 2008, the Grand Prix will likely end production, and for 2009 it may be replaced by the Zeta-based G8.
Source: Wikipedia, 2012