HELP - Buzzing from speaker under dash?
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
HELP - Buzzing from speaker under dash?
My 2000 C5 has started buzzing from a speaker under the dash on the drivers side. I think it's from the speaker that runs the door and ignition. the buzzing is eratic and is a cross between a radio not getting a station and the sound of an old dial-up modem the way the tones jump around. the "dinging" sound that takes place with the key is in the ignition sounds ok but once it stops the eratic buzzing starts. The buzzing is happening at all times, even just sitting in my guarge, I have been driving to work all week this way worring if it's going to kill my battery?
I am totally lost on what to do or even where to look? and help would be great!
I am totally lost on what to do or even where to look? and help would be great!
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
I forget the technical name of the part, but our '02 Trailblazer LTZ was doing the same thing recently. The module was in the dash directly in front of the driver seat. We also noticed that some of the memory functions were no longer working consistently (seats, mirrors, etc). The module controls certain functions of the vehicle.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
this has nothing to do with the radio. in fact, since the buzzing has started I cannot listen to the radio as it's just to much noise with the buzzing and the music... but the radio works and sounds fine.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
I forget the technical name of the part, but our '02 Trailblazer LTZ was doing the same thing recently. The module was in the dash directly in front of the driver seat. We also noticed that some of the memory functions were no longer working consistently (seats, mirrors, etc). The module controls certain functions of the vehicle.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
Tech Contributor
Joined: Dec 2003
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From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
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Race Director
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Maybe a can of Raid would take care of the buzzing?
Melting Slicks
Joined: Mar 2006
Posts: 2,997
Likes: 36
From: Ocean Springs MS
Check the Bose LOGO on the center of the door speaker grill. Hold it down and see if buzzing stops. If it does I would take the door panel off and on the back of the speaker grill retighten the little prongs that hold the Bose name on, or put some RTV on it to dampen the vibration. 
Melting Slicks
Joined: Nov 2005
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From: So-Cal California
2023 Corvette of the Year Finalist - Modified
2022 C5 of the Year Winner - Modified
I will tell u EXACTLY what that noise is, mine did the same thing. Inside the instrument cluster there is a speaker for the key in ignition chime. The speaker is soldered to the board. I opened up the cluster and cut the wire to the speaker. It was the most annoying sound you would want to hear coming from your car.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
I will tell u EXACTLY what that noise is, mine did the same thing. Inside the instrument cluster there is a speaker for the key in ignition chime. The speaker is soldered to the board. I opened up the cluster and cut the wire to the speaker. It was the most annoying sound you would want to hear coming from your car.
Some folks here are confusing this with a vibration type buzz for the radio or speakers which it's is NOT this is a static electrical type noise and it does seem to start and stop when the key is inserted or removed but it will continue buzzing after the key is removed? the static buzzing sounds will continue with the car shut off, key removed with me standing outside the car.
Has anyone repaired or fixed this module? what's involved time and expense?
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I will tell u EXACTLY what that noise is, mine did the same thing. Inside the instrument cluster there is a speaker for the key in ignition chime. The speaker is soldered to the board. I opened up the cluster and cut the wire to the speaker. It was the most annoying sound you would want to hear coming from your car.
Thanks
Last edited by DeeGee; Jul 26, 2008 at 03:50 AM.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
This sounds like it could be it...
Some folks here are confusing this with a vibration type buzz for the radio or speakers which it's is NOT this is a static electrical type noise and it does seem to start and stop when the key is inserted or removed but it will continue buzzing after the key is removed? the static buzzing sounds will continue with the car shut off, key removed with me standing outside the car.
Has anyone repaired or fixed this module? what's involved time and expense?
Some folks here are confusing this with a vibration type buzz for the radio or speakers which it's is NOT this is a static electrical type noise and it does seem to start and stop when the key is inserted or removed but it will continue buzzing after the key is removed? the static buzzing sounds will continue with the car shut off, key removed with me standing outside the car.
Has anyone repaired or fixed this module? what's involved time and expense?
The other thing you might try if it is that is put the turn signal on and leave it on. After a set time ( a minute or so) the chime sounds to remind you. That may tie it down to that component.
Pulling the IPC is quite a job and involves a lot of stripping down. Search for gauge bezel replacement and you'll find a How To.
Heres the wiring diagram to show where the chime gets its inputs. Key in, door ajar, seatbelts not fastned and turn signal left on are the main ones.
Last edited by DeeGee; Jul 26, 2008 at 03:56 AM.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
I forget the technical name of the part, but our '02 Trailblazer LTZ was doing the same thing recently. The module was in the dash directly in front of the driver seat. We also noticed that some of the memory functions were no longer working consistently (seats, mirrors, etc). The module controls certain functions of the vehicle.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
Thread Starter
Heel & Toe
Joined: Jan 2005
Posts: 24
Likes: 0
I forget the technical name of the part, but our '02 Trailblazer LTZ was doing the same thing recently. The module was in the dash directly in front of the driver seat. We also noticed that some of the memory functions were no longer working consistently (seats, mirrors, etc). The module controls certain functions of the vehicle.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
On our Trailblazer, it was the module that needed to be replaced. The module wasn't that expensive...something like $200 (?) as I recall. But, the labor involved to R&R was @ $80/hr. The module is buried behind the instrument cluster. They ordered it and it came in two days later. The dash had to be completely torn apart, so the labor charge was most of the bill.
Luckily, with the GMPP extended warranty, we paid only the deductible and got a rental car included. It took two full days as I recall...
Luckily, with the GMPP extended warranty, we paid only the deductible and got a rental car included. It took two full days as I recall...
Intermediate
Joined: Jan 2012
Posts: 41
Likes: 12
From: Saratoga Springs, New York (Trinity, Florida January through April)
I forget the technical name of the part, but our '02 Trailblazer LTZ was doing the same thing recently. The module was in the dash directly in front of the driver seat. We also noticed that some of the memory functions were no longer working consistently (seats, mirrors, etc). The module controls certain functions of the vehicle.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
It turned out to be a control module that was going bad. The sound was coming from the module as an indicator of pending full failure.
Check to see if all of your memory functions are working as they should.
I have talked to the dealer today about this and they say it sounds like my instrument cluster and they want $800-$1000 to replace it!...They want to replace the dash cluster for a two dollar speaker! Was the instrument cluster replaced on your Blazer when this took place. i find it had to believe that this is going to be a $1000 problem?
On our Trailblazer, it was the module that needed to be replaced. The module wasn't that expensive...something like $200 (?) as I recall. But, the labor involved to R&R was @ $80/hr. The module is buried behind the instrument cluster. They ordered it and it came in two days later. The dash had to be completely torn apart, so the labor charge was most of the bill.
Does anybody have a final resolution to this problem as far as what the fix was and how much it cost?
What about pulling a fuse? I can live without the key-in-ignition chime for 1000 bucks! ;-) Has anybody tried that?
Is there any other way to cut power to that annoying module and instrument cluster speaker? I really don't want to tear the dash apart.
Le Mans Master
Joined: Apr 2001
Posts: 5,421
Likes: 1,235
From: Sarver Pa
2021 C1 of the Year Finalist - Modified
I was hoping to read about a solution for this problem. My 00 C-5 is doing this and it's getting worse. Like artdogg said now it does it even setting and it's starting to kill the battery. I'm thinking the problem is the BCM. Cutting the speaker wire will kill the noise but I don't think solves the problem. Any thoughts ?