Welcome Copper. Here is some information that I believe will apply to your Equinox. Please review it and if you have any questions, please ask.
04-03-08-008B: Groan/Hiss/Grind Noise While Turning Steering Wheel at Low Speeds OR Popping Noise From Front Suspension While Driving Over Bumps (Replace Necessary Components) - (Nov 11, 2005)
This bulletin is being revised to update the Parts Information to correct the front suspension noise concerns. Please discard Corporate Bulletin Number 04-03-08-008A (Section 03 -- Suspension).
The purpose of this bulletin is to address various front suspension noises. Some customers may comment on a groan, hiss or grind type noise while turning the steering wheel at low speeds or when the vehicle is stopped. Or, some customers may comment on a popping noise from the front suspension while driving over bumps. The type of noise will determine the corrective action to be taken.