The relay is integral to the EBCM so it is not able to be replaced on its own.
Here is a guide that will help with replace this module as it contains some good info:
https://www.2carpros.com/articles/how-to-replace-a-abs-controller
As for swapping the unit, if it is the same year then I would just check the part numbers that should be on the tag on the unit and if they are the same then you will be ok swapping it.
Basically you need to put the correct software in this but that is pulled off the VIN from the GM server but it is not VIN specific.
I attached the testing that we need to run through as well in order to prove out what the issue is.
Please run through this info and let us know if you have questions.
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Tuesday, August 10th, 2021 AT 6:00 PM