Engine Control Module (ECM)
WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The Glow Plug Module is located on the front of the engine, and is attached to a bracket above the charge air crossover pipe.