Fully tested and VIN-programmed OEM ECM/ECU for the 2012 GMC Sierra 6.2L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.

Fully tested and VIN-programmed OEM ECM/ECU for the 2012 GMC Sierra 6.0L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.

Fully tested and VIN-programmed OEM ECM/ECU for the 2012 GMC Sierra 4.8L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.

Fully tested and VIN-programmed OEM ECM/ECU for the 2012 GMC Sierra 5.3L engine. Bench-tested, calibrated, and ready to install — no dealer programming required.