Originally Posted by JCL

Did you do the job yourself, or have a shop do it?
Are the old pads stock, or aftermarket? How about the new pads?
Were the rotors changed, or left alone?
Are the anti-rattle clips in the pads tight?
Has high temperature grease been applied to the ears of the pads where they touch the calipers (isolates the pads, so when the pad vibrates the resulting noise can't be transmitted to the caliper).