Front Suspension Noise

[twminter]

I have a '07 Yukon Denali with 140K miles on it and when going over speed bumps or any kind of bumps, the front suspension is squeaking. Not sure if it is worn bushings or time to replace the suspension up front all together. Any ideas on where to start with this? Seems like a common issue.

 

[BADRIDES]

Bushings

 

[twminter]

Which bushings? Sway bar?....I have also already replace rack and pinion and upper control arms.

 

[BADRIDES]

Yes sway bar