I had a shimmy when braking at about 20,000 miles, so the rotors were turned. Now 23,000 miles later, I am having the same problem. Anyone else experience this?

 

I had this issue on my 2001 SCrew. It happened twice to me as well. I just said screw it on the second time and spent the money to upgrade to EBC brake pads and some nice dimple drilled and slotted rotors. I can't complain all is good now even after about 15k since. These trucks will eat up some brakes.

 

The rotor are most likely warping. Hard stops when the brakes are cool, or getting water on them when they are hot are the most common ways to warp them. Turning them makes then thinner and then they are more likely to warp. It's time to replace them, and go for a higher quality one.

 

Thanks! That is the direction I was headed. I Researched EBC and Brembo yesterday. I will probably go with EBC.

 

The biggest factor causing rotor warping is the tightening of the lug nuts. Varying pressure from each lug nut causes flexure in the hat of the rotor and thus causes out of plane bending on the rotor's braking surface. That's that you feel when you apply brakes. Anyways, you need to hand tighten the lug nuts using a torque wrench to the factory requirements. If your rotors are warped, you could try getting them machined while still on the vehicle (see your local shop) but there will always be residual warping.

 

My dealer rotates the tires when I get my "free" oil change. I may visit with my service writer about this. Thanks.