i have an 02 silverado that has been making a chirping noise from the passenger back tire.. it is a rotational noise..it only happens when a certain part of the tire makes a revolution around the rotor..cant tell what it is..it goes away when i press on the brake and turn to the right...when i turn left it gets louder and happens more often.i have changed my brake pads twice replaced u joints and the parking brake as well..what could be making this noise???

 

could be a warped rotor, bad wheel bearings, a wheel rubbing/ loose......I would put my money on a bad wheel bearing though.

 

check your front wheel bearings for sure, from the sounds of it, it would prob be your right one but check both by jacking up the front end and grabbing the top and bottom of the tire and wiggle it if there is any play then that is your prob, also spin the tire and if there is a "grinding" noise then that is another sign of it being your wheel bearing.