2003 chevy silverado

google power steering pump whining

There may be air trapped in system, or pump could be bad.
Vehicle this old inspect hose and replace if they are leaking.
Good Luck

https://gobdp.com/blog/how-to-fix-power-steering-pump-noise/
https://www.fixautousa.com/blog/signs-of-bad-steering-pump/

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Jan 9, 2010 - 2003 Vulcan has leak through cap on power steering pump. ... Hi I'm having the same thing happening to my 98 duratech. I was just getting ready to replace the rack today because of fluid coming out the drivers side boot... so decided to ... to be removed and that the bolt is recessed and difficult to reach.

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Flush the system with seafoam. Seafoam is an additive that works to make power steering pumps quieter.

Add some power steering fluid problem solved if not replace power steering pump problem solved.

normally, the only part of your automatic transmission that will make a whining noise is the pump. it usually whines when iether the fluid is low or more commonly when the transmission oil filter is getting plugged up.

the power steering pump will also make a whining noise too.

turn the wheel all the way to the right and hold steady pressure against the stop. this puts maximum force on the power steering pump and, if the power steering pump is the one making the whine, it will change the sound of it. (usually louder).

if the trans pump is making the whine noise, it should sound different in neutral compared to drive. this test will really only work if it make the noise without the vehicle moving. if it wont do it at idle hold the rpms at 2000 or so.

if you decide the noise is coming from the transmission, and the transmission filter has not been replaced (assuming you installed a used transmission), replace the filter by removing the oil pan.



oh and also, if it is the power steering pump you should be able to make it make the whining noise while the vehicle is stationary. if it wont make noise unless its moving its not the power steering pump.

try this websites www.autozone.com and the other one is www.alldatadiy.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your truck

SOUNDS LIKE A POWER STEERING PUMP NOISE, IF THAT IS NOT IT THEN IT IS THE FRONT PRESSURE PUMP IN THE TRANSMISSION.

check power steering pump .check fluid level.

try changing the fuel filter

The power steering pump shaft may have broken inside the pump. I have seen this happen on a these trucks. Have your pump checked.