I think the first step is to identify a specific area of the noise. If you don't have to be going fast, drive by someone with good hearing and some truck knowledge. Or they drive and you listen. You can also have someone coast along side on a bike. All done in a big, safe parking lot. You also have to know if it's a rubber sound or a metal sound. A squeak, a screech, a creak, a squeal, a rub, a grind, a growl, a howl and a hoot and a holler...My guess, and probably your guess, is that it's some bushing. Applying specific soap or WD40 to an area, keeping track of exactly where it's spayed, may isolate a bushing or rubber/poly part....or if a metal sound, a different approach is necessary.
I suppose you have put it on a lift and manipulated the suspension/steering to try and hear it? Stood on the front bumper and rocked it up and down? Coasted with motor OFF and see if it still does it? Find a place to coast and go thru all the turns, bumps, hills, as necessary to be sure test is complete.
This will immediately isolate motor related from chassis related noise if you don't have a better method.You have described it as a squealing sound. That is normally a fan belt squeal or power steering pump whine or both. Especially if it fluctuates with speed of motor.
We can be thrown off by focusing on the turning direction, and all that, when it's just a belt. But I don't know what your definition of squealing is. Be sure of that word. Squealing is a longish duration sound and can even be a bearing. Spray the belts, check PS fluid level.
A squeak, on the other hand, is a definite start and stop noise with short duration. That would be a bushing.
Sorry to be so silly about the sound but I can't hear it from my house.
Troubleshooting is sometimes an art form and sometimes technical. Please excuse the over-info. Just trying to get your brain storming juices flowing, sir.
I am assuming it did not do this prior to storage and you have done nothing
AT ALL to it after storage?
Thank you for your service.
.....and then there is a whiz, a whine, a whir, a whirl, a whoosh, a wail, a wind noise...