2010-13 Silverado 4.3L Engine Computer 12635043 "Programmed to your VIN" ECM PCM

2010-14 Express 4.3L Engine Computer 12635043 "Programmed to your VIN" ECM PCM

2013 SILVERADO 4.3L Engine Computer "Programmed to your VIN" ECM PCM 12635043

2013 Express 4.3L Engine Computer "Programmed to your VIN" ECM PCM 12635043

2014 Express 4.3L Engine Computer "Programmed to your VIN" ECM PCM 12635043

2010-13 Sierra 4.3L Engine Computer 12635043 "Programmed to your VIN" ECM PCM

2013 GMC SIERRA 4.3L Engine Computer "Programmed to your VIN" ECM PCM 12635043

2010-14 Express 4.3L Engine Computer "Programmed to your VIN" ECM PCM 12635043