U codes 205 silverado...

[jcountry]

I am trying to figure out a 2015 silverado that is throwing a bunch of U codes.... All seem to be associated with ABS....

U0073-History-bus A off
U0077-History-bus E off
U0422-Current-Invalid BCM data
U0101-History-Lost communication with TCM
U0126-History-Lost communication with Steering angle sensor monitor...

Trying to figure out if these are related, and how to start trying to figure them out....

 

[87KJH]

Multiple devices on the CAN bus reporting loss of communication.

First step would be to test the battery condition and the condition of the battery connectors.
A weak battery, a loose connection, or a poor ground can cause voltage fluctuations.

Check all grounding locations carefully.
This generation of Silverado and Sierra had issues with the grounds which caused electrical issues.
Lots of u tube videos for these types of issues.

 

[87KJH]

73 & 77 are the network saying "we can't talk to components on the network"
422 is the BCM saying "I can't talk to the network"
101 is the TCM saying "I can't talk to the network"
126 is the steering angle sensor saying "I can't talk to the other sensors on the network"

Common factor in all of these codes is the loss of communication on the network.
Most common cause is power and and grounds.
Can't say for certain this is the issue because any bad component on the network can bring it down, but it is a good place to start before taking it to the shop for more costly diagnosis.
Best of luck as I too have spent many hours chasing random electrical issues on Chevy trucks.