What kind of thread lock does GM use on the caliper brackets and what is the best way to remove it? I almost couldn't get the bolts off on my 2002 2500HD. What should have been a one hour job took almost 6 hours, just for the front. None of my impact wrenches would even touch them. With the truck up on jack stands, there is not room to put a pipe on the breaker bar. I still have to do the rear, to change-out the rotors.
