2011 Silverado traction control and abs lights
 

Has anyone managed to nail this problem yet? My Silverado would do it once in a while but just took it on a 2400 mile trip and seems like it's gotten regular.

Could be a bad wheel sensor. On my Equinox the sensor is an integral part of the hub assembly. Not sure for yours. You need to put a scanner on it that reads ABS codes. I like the Blue Driver scanner, cost $100.00. I found the app on line, which was free. Sent for the sensor, took a couple of days for it to arrive in the mail. It reads engine, transmission, body and abs codes.