Duramax Second Generation: 2004.5-2005 (LLY)
I just bought, 2nd hand, a 2004 GMC K2500HD, Duramax + Allison1000 for hauling my trailer and race car. So far i'm pleased.
However, i'd like to know which motor actually is in here since the split between LLY and LB7 seems visually subtle i'm not sure how to tell. I cannot see the whole...