Low pitch squeaking noise in front end

[Cobrastud]

I recently threw some 24" kmc slides on my 09 ltz and it has begun to Randomly squeak sometimes. It's kinda low pitched and its not super obvious but it's bugging the hell out of me. The guys at the truck shop that installed the wheels said everything seems fine. The wheels are well balanced and have the correct hub bore. Has anybody had any remotely similar front end sounds. I would appreciate any advice

 

[sumo]

when do you notice it? Moving, turning, over bumps? Could be ball joints or maybe something like something stuck in the backing plate of the rotors