What axle was used in the 2007 Duramax, 10.5 or 11.5 AAM?

[kennyw]

Title says it all. Friend of mine has a 2007 2500HD with a duramax. Trying to figure out which version is in it and I cannot look at it in person at the moment.

 

[Fastereddie]

All duramax got the 11.5
As far as I know/have seen

 

[kennyw]

That is what I'm finding from Pirate as well. Thanks.

 

[HankScorpio]

This is correct. My AAM 10.5 came from a work truck with a 6.0, Duramax had the 11.5.

 

[ZooMad75]

Dirtymax and 8.1's only got the 11.5" axle. 2500hd's with 6.0 gassers got the 10.5" axle.

 

[76zimmer]

True to all the above.
Interesting note was the Express vans w Duramax only got the 10.5 axle.

 

[beags86]

True to all the above.
Interesting note was the Express vans w Duramax only got the 10.5 axle.

They were also highly detuned due to the 4L85E

 

[76zimmer]

But eventually made more than the first duramax’s did.