Good to know about the AEM p/n.

Dang about the FF ability, I searched a bit yesterday and it seems only the 02 Tahoe/Yukon w/FF enabled had that OS. Other 02 Tahoe/Yukons that were not FF had the regular OS shared with the Camaro/Vette/etc. I've heard of it possibly being doable by disabling all of the trans parameters and 0'ing out Abuse stuff in the trans section, but I have no verification or knowledge on it.