squeaking noise on the driver side

Hi,my name is tommy i have a 2011 nissan alitma .When i slow down or step on the brakes i hear a squeaking noise on the driver side . i took off the wheel and the brakes to see if it needs new brakes ,the brakes and rotors is good. i check the right side also there ok. Do you think that the wheel bearing needs to be grease or replace.Theres no light indicator on.