WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: PCM Location In Vehicle
Courtesy of DAIMLERCHRYSLER CORP.
The Powertrain Control Module (PCM) is located in the engine compartment. The PCM is referred to as NGC.