Author Topic: Really bad whistling noise.  (Read 10343 times)

Offline Bitzer!

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Re: Really bad whistling noise.
« Reply #15 on: October 06, 2010, 02:25:26 pm »
Whistling or squealing?

No Vile, I'm sure Stewart doesn't have livestock in the cab!
1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline Irish_Alley

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Re: Really bad whistling noise.
« Reply #16 on: October 08, 2010, 10:23:44 am »
I had leafs in my fan when we replaced the motor mad some weird noise so I stuck my hand in it lol scared me to death once I touched the fan forgot all about it being on
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

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Offline VileZambonie

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Re: Really bad whistling noise.
« Reply #17 on: October 09, 2010, 05:26:38 pm »
You are correct Irish. It is called an air distribution plenum by many manufacturers.
,                           ___ 
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              ⌠¯¯¯¯¯'   [☼===☼]
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Stewart G Griffin

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Re: Really bad whistling noise.
« Reply #18 on: October 19, 2010, 12:43:11 pm »
Cancel it:  i didn't have the passenger door closed all the way. :P   You know how it latches without being completely shut?  That's what happened.


i am, however, having problems with the defroster not really working----air isn't coming out of the top of the dash.  Also, the fan doesn't seem real powerful when put on highest notch.

i will try the search function as well.


Offline Dr_Snooz

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Re: Really bad whistling noise.
« Reply #19 on: October 19, 2010, 08:47:12 pm »
I would look for leaves in your blower motor or air ducts. Also if you turn off some vents, it can cause the others to whistle. At least that's what happens on my Honda. Most of the HVAC on my truck doesn't work, so I'm just guessing there.
1989 Chevy Suburban V-2500, 5.7L, TH400

1990 Chevy C-3500 Ext. Cab, 7.4L, 3L80

2009 Chevy Silverado 1500 WT 4WD, 4.8L, 4L60

Offline Dr_Snooz

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Re: Really bad whistling noise.
« Reply #20 on: October 20, 2010, 02:45:00 pm »
Sorry. I should have refreshed the page before answering. It was hours old when I posted.
1989 Chevy Suburban V-2500, 5.7L, TH400

1990 Chevy C-3500 Ext. Cab, 7.4L, 3L80

2009 Chevy Silverado 1500 WT 4WD, 4.8L, 4L60