I know they offer displacement on demand in the 1/2 tons with the 6.0L engine. But do they offer it in the 3/4 tons with the same engine?

 

Why are u going to buy a 3/4 ton and be worried about mileage? Iv'e got a 1/2 ton with AFM or DOD (Advanced Fuel Management) and I hate it. I recently bought a tuner to turn it off. I sold my Duramax 02 two yrs ago and wished I hadnt I miss it.