ABS LIGHT and stability track light came on. HELP

have the codes read , the guy at auto zoo is a sales clerk not a mechanic , the code tells you where the problem is not what to replace . They may have the answers I;m just saying

GM has issued several service bulletins for this issue. See the post below for those bulletins. In the meantime, any time a warning light is on, there are trouble codes stored. Get the codes read. That's always the first step https://ricksfreeautorepairadvice.com/category/make-model/gm-vehicles-gmc-trucks/sierra/