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11-11-2004, 12:04 PM
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Hummer Veteran
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Join Date: Aug 2004
Location: Albuquerque, NM
Posts: 46
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My 04 H2 has a high frequency (pitched) noise that seems to depend on engine rpm. It is not that loud, but after driving it for a while its a bit annoying. It seems like its related to either the engine air intake track, engine fan, or alternator (my guess). In the past, on other vehicles, I've tracked this type of noise down to alternator noise (whine) being amplified by the radio. But in the H2 the noise is audible even with the radio turned off (I guess it could be coming from the onstar/cell phone speakers, but its hard to pinpoint).
My H2 has the stock indash cd player. No aftermarket radio stuff.
Has anybody heard this? Does anyone have a fix for this?
Thanks in advance
Jon Ebia
Albuquerque NM
04 h2, airaid, predator program, flowmaster
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11-11-2004, 12:04 PM
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Hummer Veteran
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Join Date: Aug 2004
Location: Albuquerque, NM
Posts: 46
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My 04 H2 has a high frequency (pitched) noise that seems to depend on engine rpm. It is not that loud, but after driving it for a while its a bit annoying. It seems like its related to either the engine air intake track, engine fan, or alternator (my guess). In the past, on other vehicles, I've tracked this type of noise down to alternator noise (whine) being amplified by the radio. But in the H2 the noise is audible even with the radio turned off (I guess it could be coming from the onstar/cell phone speakers, but its hard to pinpoint).
My H2 has the stock indash cd player. No aftermarket radio stuff.
Has anybody heard this? Does anyone have a fix for this?
Thanks in advance
Jon Ebia
Albuquerque NM
04 h2, airaid, predator program, flowmaster
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11-11-2004, 12:04 PM
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Hummer Veteran
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Join Date: Aug 2004
Location: Albuquerque, NM
Posts: 46
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My 04 H2 has a high frequency (pitched) noise that seems to depend on engine rpm. It is not that loud, but after driving it for a while its a bit annoying. It seems like its related to either the engine air intake track, engine fan, or alternator (my guess). In the past, on other vehicles, I've tracked this type of noise down to alternator noise (whine) being amplified by the radio. But in the H2 the noise is audible even with the radio turned off (I guess it could be coming from the onstar/cell phone speakers, but its hard to pinpoint).
My H2 has the stock indash cd player. No aftermarket radio stuff.
Has anybody heard this? Does anyone have a fix for this?
Thanks in advance
Jon Ebia
Albuquerque NM
04 h2, airaid, predator program, flowmaster
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11-11-2004, 12:17 PM
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Banned
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Join Date: Jan 2003
Posts: 24,247
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Even though your radio if off, the amp is still on. Still could be something coming from the speakers.
Can you describe it better as a whine or as a whistle?
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11-11-2004, 01:54 PM
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Hummer Veteran
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Join Date: Aug 2004
Location: Albuquerque, NM
Posts: 46
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Paragon,
I'd say the noise is more like an electronic "whine", vs a "whistle" (like air coming thru the sunroof or a window.
Thanks for the info on the amp, I'll try pulling the amp, onstar, and radio fuses tomorrow, go for a ride, see if the noise goes away.
thanks,
Jon
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11-11-2004, 02:16 PM
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Join Date: Apr 2003
Posts: 318
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I've heard rumor of air intake throttle body whine as well.
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11-11-2004, 05:00 PM
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Hummer Professional
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Join Date: Nov 2002
Location: La Porte,TX
Posts: 391
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I have heard alternators whine that have 1 open diode in them. The alternator will still charge, although not to it's full output. You might have the alternator checked out to be sure that it reachs it's full capacity.
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