04 05 GMC CHEVROLET SILVERADO 2500HD 3500HD 6.6 LLY ENGINE ECU ECM 15231599

Here we have a good used engine computer removed from an 04-05 Duramax 3500hd with the lly engine, will fit gm trucks with the LLY Duramax engine ONLY. Please ensure this will work for your application by viewing all of the photos, This may require programming to your vin. These are non returnable. Any question please just inquire.