Diablo tuning module

[RethaKoch]

Yall have probably gone over this a million times but I just bought a 2015 silverado with the 5.3 and I've read and heard so many things about the v4 - v8 feature killing the valves on these trucks. Do these OBD tuners actually work and are they actually worth the 300+? I want it to stay as a v8 I didn't buy the truck to have good mpg. Thanks in advance.

[mikel]

Yes, they 100% work and do what we say they will.
You can tune it to disable AFM, and also tune for 87 or premium fuel for some more power, and you can tune the trans for better shifting, adjust throttle response, dial in the speedo for taller tires, etc.