My wife's 2014 Holden RG LTZ Colorado has the most annoying squealing noise coming from the front. It's mainly when you turn to the right but I can also hear it when on the highway. I've replaced the front wheel bearings but that actually made it worse somehow? I've been told it could be one of the clips from the ABS sensor may have broken and fallen behind the backing plate and have read just now a lot of people have had transfer case seal issues.
Noises like this are mostly temporary and are caused by a small rock or some other foreign object becoming jammed between the brake disc and the brake pad. Often, a sharp jab of the brake pedal (when it’s safe to do so) will dislodge the object and peace will be restored.
But if you’ve replaced the wheel bearings, then you’ve already had to remove the brakes. So unless the stone or whatever is lodged deep in the brake pad material, that’s probably not the cause here. Which means you need to look more closely.
The ABS sensor is an interesting theory, but I’d imagine if the clip had broken and dived into the front end anywhere, you’d have an ABS warning light on the dashboard by now. Perhaps it’s something to do with the front hub or the front driveshaft assembly. Perhaps a CV joint? Check for damage to the CV joints’ rubber boots. Don’t rule out a pothole having wrecked your wheel alignment, at which point what you’re hearing is a front tyre being torn to shred.
And what about the power steering system. These can squeal when they’re low on fluid, have air in the system, the belt is slipping or the pump itself is worn out.