WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: BLOCK HEATER 5.7L/6.1L
Courtesy of CHRYSLER LLC
1 - BLOCK HEATER
Raise vehicle.
Remove power cord from block heater (3).
Remove bolt (2) on engine block heater (1) and remove assembly.