Yes. They were better. As to what extent depends on the year. Some say that the No 8. was a problem til 2001, for the record most people saying that are trying to sell a truck. My truck has a 99/00 block in it, and over 70K on it, with no problems (JINX). IMO, You'll be fine, just dont go nut with power add ons. The 6.5 in stock form was not ment to be making 350 Hp, with 600 lb/tq. The main issue you could face with a newer block is headgaskets, which do tend to fail. I had mine fixed (both) for under 2K when one went.
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Originally Posted by HemiDon
I'm not positive, but I think it was because of the bad #8 cylinder problem on some blocks. It was done at a Hummer dealer shortly before the last owner purchased it. He has a copy of the work order, so when I get to see it I'll know for sure. I sure hope those replacement blocks were better than the originals. Does anybody have an answer to that ?
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