I have a CTS 2007 and I'm getting a service brake assist light. I took it to autozone and they pulled these three codes:
C0136, C0561 and U1061. I know they are all ABS CODES but do these codes tell me what needs to be replaced. I'm pretty good at general auto repair so I this something I can fix myself?

 

C codes related to base brake pressure switch which is part of EBCM, U code SIR related to passenger presence sensor in passenger seat. Your probably want to take it Qualified tech or shop due to costs.