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Re: 05 gmc sierra ext cab problem?
All of the newer vehicles are very sensative to Lateral Runout. It is different that a warped rotor. It is the rotor or hub wabbling back and forth. I have machined many a rotor to still have the brake pulsation. There are special shims that fit under the rotor and that help make it run true. You can tell if the LRO (lateral run out) is off with a dial indicator. At the GM dealer I worked at they would not even pay us to do a warranty brake job unless we had the measurements of the LRO. It is very important. David
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08-02-2009, 01:58 PM
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