BEagle: the AWACS has one (E-3) but my first few probes into my usual info pile hasn't confirmed KC-135 so equipped. Will dig a bit deeper, it may not.
EDIT:
The answer is that they probably do, and AIRINC did the install sometime in the late 90's early 2000's. My source is text of a lawsuit by L-3 that they were fighting the decision to give the contract to AIRINC. 90% odds the answer to you question is: Yes.
Last edited by Lonewolf_50; 3rd May 2013 at 18:30.