1999 Chevy Venture ENGINE LIGHTS ON

Brakes problem
1999 Chevy Venture Engine Size unknown Two Wheel Drive Automatic 240000 miles

2 months ago I changed to brake pads in my van because the low traction light came on and then the ABS and TCS lights came on and would stay on, I contacted a dealership and they recommended that the brakes be checked and this was the problem, after I got that done it was okay for a awhile and now again the same thing, the low traction blinks on and off (on good road conditions) and the vehicle wants to hestiate, like it's braking somewhat, and then the ABS and TCS lights come on and stay on. What could be the problem and what damage will occur?