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i had a 97 3500 drw with the 6.5L TD and it was agreat diesel not a power house and if you add power you will blow internals but when they are stock they do an excellent job allthough they are know for losing the fuel pump and then blowing the injecters,but gm extended the warranty to 120,000 miles for that issue..i would recommend the duramax,before the 6.5L..
