Range is selling the Pulsar LT that disables the DFM, auto-off and it has a lot of other features. They said it works for the 2021 Sierra 1500 6.2L/10-speed. I am curious if y'all think it will work for the 6.2L Yukon Denali? I called them, and they couldn't give a definitive answer. Based on what we know, that the rigs are identical outside of the body style, do y'all think it's worth giving it a try? Note, that this is an inline module, versus the standard range where you just plug into the port. However, it's simple enough to remove and they claim it leaves no trace behind.
https://www.rangetechnology.com/products/pulsar_lt/parts/22451
https://www.rangetechnology.com/products/pulsar_lt/parts/22451