Thanks for all the replys. I appreciate all the input. Been using this info and others and checking around. Here is what I've learned.

All of the LY6 6.0 engines have the VVT - and some have the active fuel management (DOD).

I see that the choice is to either swap my entire harness to one compatable with that...and the ECM - then go from there.

Or - do a VVT delete and a DOD delete (if equiped). Then..I'm good to go.

But - even with one that is just a VVT, the swap plus a different cam adds alot to the cost.

Yes..I agree now that doing the Bullydog is NOT the way to maintain this.

Also - FYI on the 5,000 lbs....

I have regularly towed this amount on my car hauling trailer for years. No issues - in fact...I've done that mostly in OD with the trailer buttom pushed.

The problem is the travel trailer is like a parachute. The wind pushing against it is terrible. When I am able to duck behind a passing semi truck...I can draft on them and pick up an instant 5 mph with my foot in the same spot and run up on their bumpers breaking the wind for me. I just don't have the power to overcome the load with the wind push.

So...trying to come up with a strategy around that.

Found a motor for $1,400 - the VVT delete and a cam/springs/pushrods/tune - $954. Rear axle to the 3:73 is another $700...then figure another $250 for fluids...etc. = $3,304

Now...this is much less than trading in the truck AND I will have great torque numbers to haul what I want when I want...all with a package that would look bone stock.