Any help would be greatly appreciated

I did the brakes on my dads Impala about 3 weeks ago and everything was working great for those 3 weeks. New pads, rotors and flushed the fluid. The other day however, the ABS light and the TCS off lights both came on the dash and the DIC says Service Traction Control System when you first start the car up. The traction control doesnt work and I think the ABS isnt working either but havent really tested that one yet. Other than that, everything is working great still. No fluid leaks, no change in pedal pressure or anything like that.

Any ideas?

 

unplug the battery for a minute and put it back on, it might reset the computer and the abs. It works on my f-body when i get a SES light, but impala's might be different.

 

need to get it on a scanner to see what abs sensor is reading wrong or bad as the abs and traction control system need the wheel speed sensors to be dead on to work you can also check wires to them to see if any of them got messed up as unplugging the battery will not do anything butt waste time as that system is a constant monitered system as it will reset itself when its right and manually reseting wont fix it or make it go away