Engine Noise

The squealing noise is probably one of two things. Either one of the accessory belts is a loose and slipping on the pulley, or the power pump is starting to fail.

If you have a serpentine belt, the slack should be taken up by the idler wheel, if not the you'll have to adjust each accessory belt.

To adjust the idler wheel, you'll see a small hex head bolt which will have a lock nut. There'll be a main pivot bolt that you'll need to loosen a bit. Then you'll loosen lock nut and then tighten the bolt that adjusts the tension until there is about a 1/4 inch play. The tighten the pivot bolt for the tensioner.

For the accessory belts each accessory will have its' own belt. The procedure will be the same for the adjustment bolt, but in some cases you will need a long screwdriver to hold the accessory in place to put tension on the belt and tighten it while holding it.

If the pump is bad, the noise should change when you are turning the steering wheel while your truck is sitting still.
Also check the belts for cracks, damage, etc.

There are tutorials on this site that will walk you through this procedure.

I hope this helps.

Hello,

Here are a couple other possiblilities.

Bearings going bad in either the Idler Pulley or the Tensioner Pulley.

Here is how to determine.

With spray lube in hand and engine off locate the idler and tensioner pulleys. Spray the center bolt of ONE of the pulleys then start engine, if noise is gone for short period of time then replace pulley. If noise still present turn vehicle off and spray center bolt on other pulley and start vehicle, again if noise is gone for short period of time replace pulley.

It could also be a weak tensioner. Post engine size in liters and I will post markings for checking for weak tensioner. And belt diagram showing were the tensioner and idler pulleys are.

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Never mind on the engine size just saw in your description. Pics below.

Can't find the tensioner wear diagram. However, with vehicle running take a look at the tensioner if it is bouncing around a lot then most likely it is weak and would need replacing.

Ok, in all my years of auto mechanics I have never come across a Synchronizer that was failing making a squealing noise. As for the shutting down yes but not the squealing.

Ok, if you are having to replace the entire Synchronizer Assembly then I suggest having a garage do it - a special tool is need to set the synchronizer.