Craig_R
Larry – I’ll let Jenn confirm – but I believe that all GS and GSA models have ABS. The typical ABS discussion focuses on the early models (2005-2007) with the electric servo ABS units. If the fluid is not changed regularly, they have some tendency to stick servo valves. Full replacement servo modules are expensive (~$4000??). I’ve got 86,000 miles on my ’05 with these brakes and have had no problems. (There is a company called “Module Masters” that has been promising a $500 servo rebuild service for several years now, but it still isn’t running.)