I have read all of the posts on stab sys failure and brake switch alignment...been there did that. This afternoon I was advised by a police officer that my brake lights were not working...prior to that the stab sys failure flashed on the DIC when pulling out of work...then it cleared. However, I am fairly certain that my brake lights did not work after that which leads me to believe that I have a bad brake light switch. Have any of you run into this and if so, do you think the part can be obtained from a local Chevrolet dealership?