TCS, traction and BSM lights all on

I would suspect a bad ABS sensor or wiring. A high end scan tool will corner is having issues, and/or you may have to check for continuity in the wiring harness.
 
Yes, I guess the high end scan tool is the way to go, although I understand they may charge over $100 to just diagnose. Anyway, I may have to go that route. Why the TCS and BSM come on at the same time is weird...one issue has nothing to do with the other.
 
You should start by hooking it up to a scanner, to understand what's really going on you need the error codes. Lights turning on can be a symptom of some underlying problem. Or something really simple that none of those lights indicate..

Get a simple OBD scanner from harborfreight or some other brand and write down all the codes. Then post those codes so we can help.

With a corvette i had traction control issues, all those lights on at the same time. Scanner pointed one fault code.. Steering column lock sensor..
 
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