I'm having a problem with the front brakes on my 2005 Silverado 1500. I noticed about a month ago that when I applied the brakes it sometimes felt like I had a warped rotor. This would come and go but with 172K miles I went ahead and replaced the brake pads and rotors 2 weeks ago. The problem still occurs occasionally. I can be driving down the highway and it starts feeling like I have a tire out of balance but as soon as I apply the brakes the truck starts shaking violently and can be difficult to control as long as the brakes are applied. A mechanic friend suggested I pull the ABS fuse to see if something was going on there but the problem persists. Today it happened again and when I exited the highway I was able to slow down going up a hill and pulled into a gas station and as I was pulling up to a pump and stopping it still felt like a warped rotor. I filled my tank and started home and the brakes feel normal.