Owner's Manual
Page 116
... need service. Then start the engine. Enhanced Traction System Warning Light (Option) With the Enhanced Traction System (ETS), this warning light should come on , you still light have brakes, but you if there's a problem. 1 ETS OFF If the light stayson, turn the ignition key to warn you don't have anti-lock brakes... regular brakes. If the regular brake system warning isn't on then, have anti-lock brakes and there's a problem with your Enhanced Traction System and your Buick needs service.
... need service. Then start the engine. Enhanced Traction System Warning Light (Option) With the Enhanced Traction System (ETS), this warning light should come on , you still light have brakes, but you if there's a problem. 1 ETS OFF If the light stayson, turn the ignition key to warn you don't have anti-lock brakes... regular brakes. If the regular brake system warning isn't on then, have anti-lock brakes and there's a problem with your Enhanced Traction System and your Buick needs service.