If that badge is correct, that should be an LBZ duramax…an if it is…its probly the best year a duramax was ever made, and the first or second year of the 6spd Allison. The above is an l5p, they are very good engines too, but they have some common gremlins that are known, and some that are just inevitable across all brands due to emissions..the LBZ has none of that garbage and is an absolute unit..very fine machine.