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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by 1COOLH3:
I was at Hummer Happening in Michigan and there was some "off the record" talk of a small V8.

I also had a conversation with a GM engineer and he didn't know of any specifics but he said they have a couple V8's that would fit nicely.

This would be more likely than a Turbo Deisel because deisels just are not popular in the US because of the noise, smell and the fact that deisel fuel is more expensive than gas right now.

Just my 2 cents worth. </div></BLOCKQUOTE>

As a matter of fact, there is one V8 that will fit, but some modifications are required.
I know what engine will be released in '07, I know the engine combinations for '08, and not one is a TD diesel. Can't say what they are, but I will say many are very very close. (GM could decide to go with a TD diesel tomorrow if they wanted too.)
The extra 20 that might be in a new engine, is noticeable, but in my opinion, not enough for me to sell and purchase a new one, and does not make me sorry for not waiting.
The existing engine is fine for on and off road. How fast can you really traverse slickrock?