• If you currently own, previously owned or want to own an Avalanche, we welcome you to become a member today. Membership is FREE, register now!

DOD MOD - anyone?

It's going to be much more than a PCM program.

I'd expect a bunch of wiring harness changes as a part of it as well, at a minimum.
Yep, internals are different.  Electronically actuated lifters that bleed off when de-activated.  Some other differences that are unique to an LS-2 block.

There are already several threads discussing this..... pretty major mechanical differences as well as PCM differences.... it would be cheaper to buy a new Av..... :D