I have a 2003 2500 QC long bed 6speed and here lately my brake and abs light keep blinking on and off on and off and it also chimes when this happens. Is there a sensor for this that could be loose or something. There are no codes that show up when u do the key thing 3 times it always says done. Also no codes show up on the smarty either. Anyone know what could be causing this. Thanks

 

I replaced the right front hub assembly on my truck and afterwards, my ABS and Brake lights on the dash were on. I think it was a bad sensor, but I haven't gone back and messed around with it. Not sure if the rear has the same sensors, but I would check the sensors.