Abs traction control

I have 2008 Silverado had the rear end changed
out and started driving then abs and traction
control lights was on so I did everything under the
sun and moon but what fixed my problem was I
changed out the brake light switch under the
dashboard and I changed out the rear wheel
sensors and before I could back out the driveway
the lights was off. I drove it about 20 mins still no
lights so hopefully this will help you guys out