Tony at TDP was kind enough to send me a tuning file to try.
I reprogrammed and got these results on the NVK3 PCM
01 TDP file higher injector cut-in, not much different than stock 00 setting
(not sure how aggressive this file is)
02 1000 rpm DAC3 1000 rpm as expected
03 80 HP DAC3 higher injector cut-in, less power than 05
04 1000 rpm NVK3 1000 rpm as expected
05 80 HP NVK3 normal injector cut-in at idle, idle is higher than 01,03, and engine "misses" when accelerating between 1500-2000 (I assume this is because the PCM does not see TC lock), way more power than 03
WTS light and idle "hiccup" occurs when switching from DAC3 to NVK3 as expected
Is it possible that the PCM "ignores" the DAC3 programming because everything that is programmed DAC3 seems very similar power wise compared to stock 00 setting.
Not sure what to do next, aside from search around for a genuine DAC3 PCM to purchase, or an E99 California emissions truck is so goofy that I should just leave it stock.