Engine Sqeak I have a 2003 Chevy Silverado 1500 (w/ ac) and started to hear a squeaking noise coming from the engine, so i sprayed belt conditioner on my serpentine belt and it made the squeaking noise worse so i took the belt off and turned all the pulleys. All of them turned fine except the camshaft pulley. Is this normal? and if not whats wrong with it and what do i need to do to fix it?

It sounds like you just have water spraying somewhere it shouldn't. Do you have the protective panels in the wheel arches and under the engine. Some people take them off.

The squeaking noise might be the serpentine belt slipping. You can get a spray called 'Belt Conditioner'. It softens it and makes it grip. It often needs two treatments a week apart.

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ac clutch could be contaminatd with foriegn material like leaking fluids if not the ac compressor clutch is bad this is located on the the ac compressor

Well,a drive belt needs to be replaced every 50,000 mi. or so,and a weak tensioner can allow slack which causes sqeak even if the belt is good.
The idler pulley on those is easy to replace also. If the tensioner isn't holding the drive belt very tighly,replace it and the belt.
Auto Zone will let you put down a deposit and borrow a tool to work the tensioner so the belt can be easily removed. don-ohio

it is your belt it needs to be replace you can buy belt dressing spray to use but if you have lot of miles I would replace the belt good luck..

big end bearings( lower engine rod bearings to confuse) knock at idle and get louder with rpm
if the noise changes with rpm and you are hearing it near the ac compressor then it could be the ac pulley bearing
test if it is the compressor by listening and then turning the ac off the pulley will still spin but the compressor stops
if the noise remains , replace the pulley bearings

You might have a dry bearing in the alternator. I've had a squeaking noise from them.

Remove the auxillary drive belts and run the engine without them .If the noise is gone then its something driven by the auxillary belts.if not then check timing belt runners [if fitted]But check oil -water levels first

find fuel test port on motor & pull cap of ck for press

As you probably know squeaking could be alot of things, but the most common noise, that would not effect performance, would be serpentine belts. You can buy a can of belt dressing at Autozone, that you spray on the inside, the contact side, of the belt. If it is the belt, this should help. If it's been a long time since replaced you may want to replace belt. Alot of those belts will break after being worn out, but the better quality belts may not break, but they will make a horrendous squealing noise. If it's not the belt, you'd have to have someone look at it to troubleshoot. Good luck.

there is a vacuum line PCV that goes to the drivers valve cover the hose could be broken down and causing the noise could be other things but that is the first thing that comes to mind