Answer:
In February 2001, GDLS were contracted to supply 240 M1A2 tanks with a system enhancement package (SEP) by 2004. The M1A2 SEP contains an embedded version of the US Army's Force XXI command and control architecture; new Raytheon commander's independent thermal viewer (CITV) with second-generation thermal imager; commander's display for digital colour terrain maps; DRS Techologies second-generation GEN II TIS thermal imaging gunner's sight with increased range; driver's integrated display and thermal management system.
further details can be found at www.army-technology.com/projects/abrams