2008 Tahoe LT 5.3 with 164k miles

Hello gmforum!

A few weeks ago I drove to a friends house with no problem as usual and out of the blue I turned the key which illuminated my dash display no stabilitrak, abs light on, brake light on, no park assist, and engine light on. I don't know how, but I managed to limp home. I checked the brakes to make sure they worked mechanically before driving a few miles home or I would not have chanced it. I plugged in an OBD scanner and it showed the following:
U0073 Control unit: Engine control unit
U0100 Control unit:7EA
C0045 Control unit: ABS/EBCM/ESC
U0100 Control unit: ABS/EBCM/ESC
C0242 Control unit: ABS/EBCM/ESC

So far I have...
Replaced and checked all 4 speed sensors because when I drove home the speedometer was bouncing around which I had never seen before.
Inspected wires around transmission
replaced ground harness from engine to firewall after seeing some corrosion
replaced negative battery cable after getting a low reading on multimeter
replaced brake light switch behind the brake pedal because I read it could be an issue and was a cheap hope and prayer, lol
unplugged ECM for burn marks and it was clean, but the ECM aluminum is very corroded

The transmission fluid was replaced several months ago and has hundreds if not a 1000 miles with no issues or leaks
Engine oil was replaced around the same time

I live across the street from the beach and I'm always chasing rusty metal and corrosion if that helps...
Could it need new hubs? Is my ECM shot?

Any advice would be much appreciated.

I don't think all of the sensors went out at one.

I do think that ground straps that are corroded can easily cause this. Trace every ground point in the car and make sure they are clean metal to metal with no rust.

I'll keep chasing the ground wires for now. I did replace the battery with another new working battery and it still had the same issue, so I know the battery is not the problem. Thanks for the reply.

Since it runs some if the faults are not current. Erase it all and see what comes back.

I've cleared the codes multiple times and it only takes a few seconds before it comes back. I always hear the abs module click like 5 to 8 times before the dashboard check lights come one. Thanks for the tip though.

How you clearing the codes?

I'm using an app called Car Scanner and a Bluetooth OBDII dongle. I'm thinking its time to get a proper two way OBDII scanner. Any suggestions? Thanks for the reply.

Search the forums. All kinds of info.

I've seen a Foxwell NT630 that works pretty well at a reasonable price.