17-21 CHEVROLET GMC 3500 6.6 L5P DURAMAX DIESEL ENGINE COMPUTER ECM ECU 12708723

Here we have a good used engine computer removed from a 2020 GMC 3500hd. Should fit most 17-21 duramax trucks with the L5P engine only. Fully functioning condition but will need to be programmed to your vehicle. Make sure this will work in your truck before purchasing!