Caterpillar C15, ECMs, (GOOD USED) 2006 Peterbilt ECM Instrument Control Module Q27-6001-00322 For Sale, Part # Q27 6001 00322, Q27600100322, REV A, 05421AA, SW Vers. 2.2, 1 Rectangular 6 Pin Plug, 1 Rectangular 10 Pin Plug, Pulled off a Caterpillar C15, Serial # 050216511208, Stock # 7972