2009 Envoy StabiliTrak and Break System Warning Lights come on simultaneously

What is your question?

Hello all.....My 2009 Envoy StabiliTrak and Break System Warning Lights have recently started coming on simultaneously, accompanied with chimes, but very intermittently and only when breaking, whether it being hard or light breaking, and during good/dry weather/road conditions. Any thoughts/ideas or advice would be appreciated.

How long has your 2009 GMC Envoy had this problem?

a month