grinding noise in front right tire

Hi all,
I have a 03 Denali AWD and I can hear/ feel a loud grinding noise in the front right tire when I apply the brakes.  I changed the front hub assembly, rotor, and brake pads and it is still making the grinding noise. I can hear the grinding noise at speeds of 5-10MPH but I can really hear it when I apply the brakes.
Any suggestions would be appreciated.  
Thank you all for your time.  

i would like to know....

did you change the front brake caliper hardware kit..  and check or change the brake caliper hardware kits on the back...

why...

the folded metal shims that fit inside the caliper brackets that grab both ends of the brake pads... hold the brake pads tight and steady...

when these shims loose tension.. the brake pads can move around.. creating a HUGE noise like grinding...

i just had to replace them on the back of a 87 300ZX... it was so noisy you could not hear the stereo inside the car...  the owner was afraid to drive it... people would stare at him as he drove down the street... and that kind of stare is not what he was thinking when he bought this red sports car....

you might want to lay out some sandpaper... 120 grit.. while you have the pads out.. run the friction surface across the sand paper to remove the glaze....  

No I never did change the hardware kit.  I will try that next.  Thank you soo much for the advice.