Originally Posted by g4medtp
What is the benefit of a full delete?
Benefits: Reliability (emissions controls are nothing but a liability for the owner; stock firmware code mandated by the EPA causes the vehicle to refuse to start if the emissions systems aren't functioning), less hassle, better engine longevity thanks to the required PCM tune that also disables EGR, and mild improvements to fuel economy.
Drawbacks: if you live in an emissions inspection state it might be a bit difficult to pass (haha), cost, and you can kiss your warranty goodbye.
Oh, and I guess you can "roll coal" with a full delete. That can be a benefit or drawback depending on your perspective.
The GDE Hot Tune is an intermediate step between stock and a full delete. It disables some of the emissions systems via code and tweaks the operation of the emissions systems that are still active.