OEM Engine Control Module ECU GM Silverado Sierra 6.6L V8 Diesel 17-21 12708723
2017-2021 Chevrolet Silverado 2500 HD 6.6L V8 – Diesel. 2017-2021 Chevrolet Silverado 3500 HD 6.6L V8 – Diesel. 2017-2021 GMC Sierra 2500 HD 6.6L V8 – Diesel. 2017-2021 GMC Sierra 3500 HD 6.6L V8 – Diesel.