2004 Silverado Power steering

Run the fault codes and check for TCM problem as the instruments are controlled from it. By the wheel I take it that you mean the steering wheel in which case check the power steering pump belt condition and tension.. Check oil level in steering reservoir.

First change the belt driving the compressor. Belt slippage is the number one cause of low cooing at idle or slow speeds (if the charge is OK)

What is the idling RPM of the engine when this is happening? There are many different types of power steering systems out there these days on vehilcles. It would make it a bit easier if we had a little more information before we give you advice. Year, Make Model, Milage, ect...Any other known issues with vehilce? Yes, the most likely culprit could be the pump because as time goes on the internal pump compoinents start to wear down and the tolerances become to great and at low rmp it cannot keep the proper pressure needed to give adequate power assist to the steering gear.
Hope this helps
Sincerely'
Roger

replace all fuel filters, and i mean all

It MAY,,,,,, be the start of a power steering pump problem.Just maybe.The pumps can moan and groan without leaking,so keep an eye on it.Hope this helps.

Hello, This could be an indication your A/C is low on Freon or your Power Steering pump is low on fluid. Both systems are made to increase the idle speed to make the system work better. What happens in the case of the A/C, is the A/C compressor puts a strain on the motor when it engages the electric clutch on the compressor.

The A/C is wired such that when the compressor clutch engages, the engine RPM is increased to maintain the idle speed. The controls do this automatically and when your compressor is low of Freon, there is little resistance and the engine overspeeds. You are burning up your compressor if you lose the lubricant packaged inside it. That noise you hear is a dry compressor.

Turn your A/C or Defroster off and see if the overspeed and the noise stop. The compressor will run in the Defrost cycle too! Eventually your A/C will lose more of the Freon until the low pressure switch cuts the power to the compressor completely.

Some front wheel drive cars have a boost sensor in the power steering assembly for increasing the idle speed when you are turning the steering at low speeds. If the fluid level is low, it tricks the sensor into speeding up the idle to assist steering. Like in the A/C example, you can get overspeed when the fluid levels are low.

I hope my solution is very helpful in fixing your problem. Have your Freon checked or throw in an "OIL Charge" with the proper type of oil for your compressor. Then check your Power steering.

The VOLVO 740 does not have speed sensitive power steering, so is a little harder to turn when going slow.but is very light when doing over 100mph.

If your steering is easier above idle the problem is the pump.

Sounds like you have air in your steering system. I would start by looking for any leaks on your steering system like hose to fitting crimps, steering pump, etc. Check your steering fluid level to make sure it is full and also look for bubbles on the dip stick. If everything looks good, start the vehicle and turn the wheels all of the way to the left and then to the right. Do this while the vehicle is in park and repeat at least 5 times. This will work out any air in your steering system. If the problem persists then the power steering pump may need to be replaced.

no it is the power steering pump. the pump is worn so at low rpm or low speeds it is real tough to steer. but when the rpm is picked up the steering gets easier.

Also check belt tension but at high rpm speeds the belt would slip and squel real loud. so i would point the problem to the power steering pump.

hope this fixs ya!!!!!!!!!!!!!!!!!!!!!!