Weird squeaking noise from under hood started from sitting an hour after being driven ,noise goes away when accelerating but comes back when not ,when parked noise is constant a type of squeaking noise

Sounds like a air vent problem.next time it does it loosen the gas cap slowly and you should hear a whoosh of air. Get a new gas cap. If that is not it you have a problem with the fuel emissions tank on the frame or under the hood.

What is ur oil pressure and can you tell if sound is coming from top or bottom

One of your belts need to be replaced

sounds like your brakes are getting bad you probably have rotors on the back and your back brakes will have the little chirpers i call them they make a noise when your brakes are needing to be changed, hope this helps.

are you sure its not your fan belts? because if fan belts are not turning, it means that the engine is off. check if the tension in your fan belts are still ok. if not, have it re tensioned. if noise is still present, have it changed.

Check to see if one of your brackets holding the exhaust pipe has come loose. That'll make a rattling sound - especially if it towards the end by the tailpipe. When you're accelerating - more air is forced thru your exhaust at a faster rate, so it's not moving as much as when you're sitting still and the truck is just at an idle with less air/exhaust moving thru the tailpipe. If it's only making the noise while the truck is stationary & the noise stops one the truck is moving - that pretty much rules out anything to do withe the drive-train or suspension. You are sure the noise is from the back & not coming from under the hood? If under the hood - check your oil level ASAP.

Probably the compressor causing the belt to squeak. Try spraying just a squirt of wd40 on the drive side of the belt. It the noise goes away, its the belt. If not, its the compressor drive.

sounds like you have a pad rubbing on a disk/rotor, if you jolt the brakes does the noise go away? if so it's probably a pad loose

the smoke is coming from the belt because a part has stopped turning ...you need to check which one it is... it could be the water pump...alternator ..a/c compressor...... power steering pump or the belt tensioner.... and your going to need a new belt

Most likely AC clutch assembly. Have it checked & unplug wires to it, if necessary, to use temporarily, so that clutch doesn't engage.