Re: 2013 GMC 3500 brakes issues
I'd you can go to Youtube and search for anti-lock brake testing procedures. That's what I did when my dually brakes started acting. My issue was a bad speed sensor on the LF hub.
PS, glad the new hoses made your situation better.
1972 El Camino SS (sold)
1981 Camaro Z28
2005 Silverado 3500 LS
2013 Sierra 1500 SLT