Here is the TB. No good on the booster area. Again it's a 5.3 AWD Denali
Well, I don't have the fancy-pants Denali, but my '03 XL *is* a 5.3, friend.
That's why I jumped in the post.
Anyway, here's what mine looks like...and it looks like they changed things up in '05, based on your pics. Oh, and gentle admonishment... it should be a 4WD, not an AWD.
If you want me to snap my TB, let me know (sorry it's not visible in the wide shot)
(only the one plug is visible here, but there's a second one behind it - I checked.)
On edit:
Quoth
@Mooseman - 'But man that looks a LOT like a PCM.'
It is...there are two part #4's listed, same 8-digit part #.
I guess what they're trying to show is that the TAC is integrated (?) into the PCM -?
GM doesn't usually list parts that way, though.