Excessive Wind Noise

TonyMack · September 18, 2008

I just purchased a 2004 3/4 Suburban LT 4X4 6.0L to haul our trailer. I have noticed excessive wind noise as I increase speed. I went to a local auto glass store and had them re-seal the windshield. I thought that would fix it but the noise is still there. The wind noise increses with speed and hits a peak at about 55 Mph. Best I could describe it would be that it sounds as if the front window defroster vents and blowing air at full speed - even when they are turned off. It also seems to be orginating from the passenger side.

I'm pretty sure the windshield has been replaced...and it's now properly sealed. But, is there a "baffle" that could be missing? Basically sounds like rushing air.

Thanks,

Tony

2000DV4.8 · September 18, 2008

Do you have a bug deflector?

TonyMack · September 18, 2008

Do you have a bug deflector?

Thanks for replying. No, there is no bug deflector or anything aftermarket. I just took out n the highway again...it literally sounds like the blower motor going into overdrive and blowing air through the defroster to the windshield. It's as if there is nothing to slow (or baffle) the outside air rushing in at 50Mph. Could it be coming from the air intake for the HVAC system?

Thanks....

abracadabra · September 18, 2008

Could it be coming from the air intake for the HVAC system?
Thanks....

That's what I was thinking...

Majorleaguebass · September 18, 2008

Do you have a bug deflector?

Thanks for replying. No, there is no bug deflector or anything aftermarket. I just took out n the highway again...it literally sounds like the blower motor going into overdrive and blowing air through the defroster to the windshield. It's as if there is nothing to slow (or baffle) the outside air rushing in at 50Mph. Could it be coming from the air intake for the HVAC system?

Thanks....

i have that same problem...when i kick the ac into recycle...it does it worse than if i have in off of recycle...i want to know what it is to so i can fix the problem also

Wingnut · September 18, 2008

Weird.

TonyMack · September 18, 2008

I found this link to the heating system on another site...scary what you can find on the internet. It shows a diagram of the entire heating system in the passenger footwell....I'm nto a mechanic but I'm going to have a look to see if maybe something is broken or missing in air inlet housing or if the air inlet actuator is unhooked....

http://i6.photobucket.com/albums/y221/fogle04/84858756.gif

Zembonez · September 18, 2008

Extreme wind noise is pretty unusual in GMT800 and GMT900 trucks. I've owned a several of them and never had one that seemed excessive. Let us know what you figure out.

TonyMack · September 29, 2008

Well it's solved.....I discovered that the windshield had been replaced and discovered the wind noise was actual wind coming in under the windshield on the passenger side. Since it was above the HVAC unit it was hard to tell where it was coming from exactly.

Just came back from a friendly auto glass installer who removed the trim and improperly installed window sealant and repaired the shoddy work...all for 20 bucks cash. No more noise.....!

Thanks,

T