2007 Tahoe LTZ wiper washer gone crazy

google 2007 chevy tahoe ltz ls owners manual there several downloads for free.

https://chevytrucks.org/owners-manuals/2007-chevy-tahoe-owners-manual/
https://ownersmanuals2.com/chevrolet/tahoe-2007-owners-manual-77273

I believe that light is the 'automatic day/night mirror' indicator. You can turn it on and off by pressing one of the buttons on the mirror. See owners manual for more info.

Do all the other dash lights work?
If so, the LED display in the stereo may have burnt out

Perhaps, but check all wiring, fuses first.

problem is most likely the wiper control module, not sure but check with your dealer for possible warranty.

Spark Plugs

Air Filter

Fuel Filter

The turn signal socket, where the bulbs are fitted, needs to be inspected.Also the wiring needs to be inspected.Wiggle the socket and wiring a bit, then check, if the blinkers start working or not.---------- There is a troubleshooting procedure to confirm the fault,Click this link below and go through the procedure :--- http://howtobyme.blogspot.com/2011/09/blinkers-works-intermittently-on.html ---------- This will help.Thanks.Helpmech.

There are three fuse boxes (or fuse blocks) on the '07 RAV4--two in the engine compartment and the other by the driver's left knee. I'm sure there's a fuse for the wiper. Unfortunately it's likely to be on the UNDERSIDE of the interior fuse block. You'll need a mirror to locate the fuses since even if you get your head under there the fuses are too close to see (unless you're incredibly near-sighted).
My rear window wiper has operated intermittently since nearly the day I bought it. The dealer says to replace the motor for $400+. I just live with its craziness. There's probably a short or loose connection, but I haven't found it yet.

you need to get the vehicle scanned for a fault code in the TCCM
untill you have a code i can't help you