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GMCPICK-UP Enthusiast

GMCPICK-UP

Posted
Posted

I have a 1989 GMC Sierra 1500 4.3 and have already replaced 3 pumps. 2 pumps I replaced

within the past two months. They are rebuilt pumps from AutoZone and every one of them

makes a whining racket loud noise. I removed all the fluid each time and flushed out all the

fluid replacing with new and then bleed all the air out.

Is there something else that can cause this noise? Its not whinning that bad at idle but it gets

louder as you drive.

 

Thanks for any and all help.

alvocado Enthusiast

alvocado

Posted
Posted

My factory pump has whined for the past two years during low speed turns. I haven't tried switching to Valvoline synthetic as recommended but it functions fine aside from the noise.

pm26 Senior Enthusiast

pm26

Posted
Posted

I do not buy rebuilt parts from Auto Zone. The reason is the quality of their rebuilt parts is bad. Most of them are bought from the lowest bidder vendors who "rebuild" these parts in Mexico or another fine 3rd world country. "Rebuilding" is evidently defined as replacing a few seals so the thing does not leak. Try NAPA.

GMCPICK-UP Enthusiast

GMCPICK-UP

Posted
  • Author
Posted
I do not buy rebuilt parts from Auto Zone. The reason is the quality of their rebuilt parts is bad. Most of them are bought from the lowest bidder vendors who "rebuild" these parts in Mexico or another fine 3rd world country. "Rebuilding" is evidently defined as replacing a few seals so the thing does not leak. Try NAPA.

 

 

 

I will not buy anymore rebuilt parts from Auto Zone either. You are right about the quality or lack of quality. Thanks and I will check NAPA.

ThomasV Enthusiast

ThomasV

Posted
Posted

I had the same problem on my 94 Silverado. I replaced the power steering pump with a rebuilt one 3 times. Each one whined - drove me crazy. I contacted the supplier and they told me I wasn't purging the air out of the pump correctly... yeah, right. I bought a pricey brand new GM Delco from GmPartsDirect and it's quiet, just like it's supposed to be. I'll never put a rebuilt power steering pump on again.

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