[ob_1jr]

The only way that you could get a duramax without the allison is if you got the zf-6 manual. I have not heard of anyone getting a 2500HD or 3500 without either of the 2 trannies. I could be wrong, but I think that was an error that you saw....normally the duramax/allison combo was designated as the heavy duty power package.

 

[ob_1jr]

I think maybe it is an option with the diesel vans, but I would highly doubt that a dealer or GM would allow it to happen. I think the site is screwed up. I guess I never tried to do the build it like that...most of the time I just put in the heavy duty power package and was done with it. But you are right, it is a moot point.