Jumping in to clarify on what was said here. Our AFM/DFM Disabler does not and will not officially work for 2019+ 6.2 10-speed trucks. Some customers have ran our Disabler on their 6.2 10-speed trucks without any issues, and some reported issues with fluctuation in revs when at cruising speeds. This is the result of coding limitations that are posed by the module accessing the ECU via OBD port, hence why it can be disabled successfully with the Pulsar LT working as an inline module.
As for Mudcon's question about fuel economy, it completely depends on your driving style. Some users see no change, some see better MPGs, some see worse. With the increased throttle response that this product provides, it's pretty easy to become a leadfoot. ?