stilllearning6

2003 Tahoe 5.3L:
My 4WD selector switch button does not light up as it did last month.
I have been pouring through the forums and the internet trying to understand the 4WD fuses and their locations.
I cannot find the "ATC" Active Transfer Case fuse in either the engine bay fuse box nor inside the cabin at the driver door edge .

Can someone guide me to the suspect fuses ?
I attached the photos of each fuse box map.

It is my understanding that the ATC fuse is 20 amps and others discussed R/R the ATC fuse.
I can only find the 15 amp 4WD fuse.
Is there another fuse box to check?

stilllearning6

Here is what I found on the web :

" TREC fuse, in the under hood fuse block. Take the cover off, lean over the fender, first row of fuses closest to the fender, second from the right (rear) side. It's a regular 30 AMP fuse that powers the transfer case encoder motor and the shift control module."

Looks like the answer is : TREC Fuse, 30 amps.

Why can't the owner's manual provide that info for me?