Hello Duck!
Yes, there are several products that reprogram the computer controls on your engine to gain torque & hp. I run an Edge Evolution on my 1996 truck and have been quite happy with it. I used it before any other modifications and still noticed a difference. I just didn't bump it up to the higher settings.
No, it will not harm your truck if you follow the instructions and take the manufacturer's advice on settings.
The factory tries to set the engines up to be all things to all people by finding the lowest common denominator and setting the engine at that point.