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05Yukon23
09-06-2011, 12:38 AM
Hey guys I haven't been posting much lately, been busy with work and such. ANYWAY, lately I have been hearing a whistling under the hood. I was told to replace the belt, which greatly needed it. Still the whistle persists. It seems to come from power steering pulley? Any suggestions?
sumo
09-06-2011, 01:20 AM
well you can take the belt back off and run it. Whistle stops? If so its one of the acceseories. Spin the alt, ac, and ps by hand. Does any of them feel like they are binding?
ezdaar
09-06-2011, 03:56 AM
check for vacuum leaks.
Rivieraracing
09-06-2011, 06:15 AM
Do you have a cold air intake? My intake would do that sometimes, especially when stepping on the accelerator!!
05Yukon23
09-06-2011, 09:48 AM
I wish I had a CAI. It seems to only do it at idle then goes away if I give it any gas. If I get time I'm going to see if the pulleys are binding at all.
02tahoeindiana
10-26-2011, 10:59 PM
I wish I had a CAI. It seems to only do it at idle then goes away if I give it any gas. If I get time I'm going to see if the pulleys are binding at all.

Might not go away just the engine noise overpowers it...just a thought. I had a bad intake gasket that sounded like a vaccum line...but my truck had a spratic idle from it
blueflamed03
10-27-2011, 02:08 PM
sounds like a vacuum leak
05Yukon23
10-27-2011, 02:11 PM
sounds like a vacuum leak

That was my first guess. Checked all over. Yesterday at the dealership the mechanic asked if I have heard it and said that it was common and was a pulley. Anyone else have this sound?
blueflamed03
10-27-2011, 02:13 PM
maybe a bearing going out?
bkboatnsleds
10-27-2011, 10:22 PM
I had same issue on my tahoe.. Thought it was my cold air intake too.. seemed to only happen at idle, and at lower temps. YOur right - it IS the P/S pump, and there is a TSB on this issue.. but trying to find it..

---------- Post added at 09:16 PM ---------- Previous post was at 09:05 PM ----------

ps. I didnt do anything to mine... and it comes and goes.. 160k miles....

---------- Post added at 09:22 PM ---------- Previous post was at 09:16 PM ----------

looks like its on NNBS too
#06-02-32-010A: Power Steering High Pitched Whistle Noise Heard in Any Gear with Vehicle Warm (No Fix Available at This Time) - (May 22, 2007)
05Yukon23
10-28-2011, 01:39 AM
I had same issue on my tahoe.. Thought it was my cold air intake too.. seemed to only happen at idle, and at lower temps. YOur right - it IS the P/S pump, and there is a TSB on this issue.. but trying to find it..

---------- Post added at 09:16 PM ---------- Previous post was at 09:05 PM ----------

ps. I didnt do anything to mine... and it comes and goes.. 160k miles....

---------- Post added at 09:22 PM ---------- Previous post was at 09:16 PM ----------

looks like its on NNBS too
#06-02-32-010A: Power Steering High Pitched Whistle Noise Heard in Any Gear with Vehicle Warm (No Fix Available at This Time) - (May 22, 2007)

That kinda sucks. It's annoying when I try to take great care of maintenance and have that stupid sound coming from under the hood. Maybe a new PS pump will fix it. I was told that because of the way they go on, replacing the pulley alone won't solve anything.