I have a 2015 Silverado 2500. I have replaced the Rotors and Pads in the recent past but all of a sudden it has begun pulling hard to the left. I have bled the system twice and it is still doing it. What do I need to try next?

 

is it pulling only when braking? what about emergency/panic braking

 

Both but its really bad when "panic" braking.

 

From past experiences check the right brake hose. What I have found was the bracket that bolts to the a arm rust and will restrict the flow of brake fluid. This will only allow the left side to work at first and it will pull to the left. I even had one so bad when I removed my foot from the brake it would keep pressure on the right side for a few seconds. I jacked the front up pressed on the brakes got out of the truck tried turning the left front tire and it spun freely went to the left side and the tire was still locked up.