Whistle from engine bay after water pump.

[Ken Rolls]

Is it a new hose and clamp on there?
Gates or GM would be best choice for replacement.

Its the chrome hard one on the top. Leaks where its pressed in the body of the pump.

 

[Ken Rolls]

How about a pic or two for all of us?

 

[OR VietVet]

So, not the install that created the leak, is poor quality pump. What brand is it so others here know to STAY AWAY from that brand. Who knows, the noise may go away with a quality pump install. I will say this as well. Sometimes you just get a bad new part, even if is Genuine GM pump or AC Delco, but the odds are always in their favor.

 

[MassHoe04]

As always, AC Delco OE (Pro... Not Gold, if possible) is first choice. For me, since it is reported to be an easy install, I would probably save myself $50 and go with a Gates. $98 with thermostat and t-stat housing. Not Ac Delco, but I have never been disappointed with Gates and I have never had to replace one I installed before the vehicle was done for good.

 

[RAMurphy]

Concur. The water pump on my brand new 2002 Tahoe lasted nearly 220k miles before it started weeping. Based on that, I replaced it with the same ac delco part. I have 175k on this one. When I finish my 6.0 build I will be replacing it with another ac delco as a preventative measure. As stated if you want to save a little money I too have heard Gates is a good solution.

 

[Ken Rolls]

So, not the install that created the leak, is poor quality pump. What brand is it so others here know to STAY AWAY from that brand. Who knows, the noise may go away with a quality pump install. I will say this as well. Sometimes you just get a bad new part, even if is Genuine GM pump or AC Delco, but the odds are always in their favor.

It was an online purchase. I don't recall brand.

 

[MassHoe04]

It was an online purchase. I don't recall brand.

Since it is just pressed in, you might be able to work it out and apply some RTV or Teflon thread sealant on there and push it back in.
Could be cheap way to not replace the hole thing...

 

[houstontaylor]

The whistle sound could the tensioner pulley bearing.I have one that squeals.

Or the serpentine belt idler pulley which I just replaced because of a bearing whistling sound at certain RPMs in cold weather.

 

[houstontaylor]

On my 2003 Tahoe I had a whistling sound at certain rpm's in cold weather from the AC compressor belt tensioner pulley 9 months after replacing it. I didn't suspect it at first since it was OEM and so new. I also seemed to have been getting some whistling from the fuel pressure regulator vacuum line since when I pulled the boot off the regulator it stopped. The vacuum boot at the intake manifold was cracked along with the rubber connector near there for the pcv line.