2007 Chevy 3500 Hd Extended Cab Subwoofer Enclosure 2007 Chevy Express 3500(62,000miles). ABS, Brake, And Smart Trac Dash Lights All Remain On. How To Diagnose?

2007 Chevy Express 3500(62,000miles). ABS, Brake, and Smart Trac dash lights all remain on. How to diagnose? - 2007 chevy 3500 hd extended cab subwoofer enclosure

We have a lot of rain last week, and our two vehicles had the same question ABS light. The ABS control of my truck came twice, and was not recovered. The lights of the van used in any application. Thank you for any help!