Why does my GMC ABS light keep coming on?
Why does my GMC ABS light keep coming on? If the ABS dash light comes on and stays lit, and none of the ABS wires are damaged, it is likely that there is a partial failure in the ABS sensor. For specific information about GMC ABS braking systems, consult the particular vehicle's manual (see Resources). What to do if your GMC ABS is not working? Turn the ignition to the "II" position and check the ABS dash light. If the ABS dash light comes on and stays lit, and none of the ABS wires are damaged, it is likely that...