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High frequency noise coming from dash when in 4WD

grizzlyrafting

By grizzlyrafting
in Troubleshooting & Recalls

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kdickey05 Enthusiast

kdickey05

Posted
Posted

I got a call from my dealership after having it in and they said they have a couple bulletins on noises but no fixes yet. So incredibly ridiculous.

 

Anybody that gets/sees this response, please reply with your name and VIN number and I'm going to submit a claim to the Better Business Bureau about this. GM has had zero positive responses in regards to this. I've been in contact with GM corporate even (not just dealerships) and it has gotten me nowhere. So maybe if we get a pile of people attached to a BBB claim, we'll get somewhere. Or maybe even better, everyone submits their own. But if you don't want to do your own, attach your info here and I'll do it.

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kdickey05 Enthusiast

kdickey05

Posted
Posted

Let me know if you need a list, I can send your our whole fleet that all do it.

I would love a list of your whole fleet. I want as many names and VIN numbers as I can for the BBB claim!

MD2014 Enthusiast

MD2014

Posted
Posted

I posted on this topic back in Jan 2014 when I bought the truck.... It still makes the noise in 4 wheel auto and drives me insane. Its almost not worth using 4 wheel auto in the rain or ice because it makes me sick with headaches...

 

I have also recently been hearing a similar noise when my truck is in 2 wheel drive. It occurs under acceleration and sustained highway speeds. The radio does not drown it out either.

 

It doesn't seem like GM cares much about this issue....

LaserBlueZ71 Enthusiast

LaserBlueZ71

Posted
Posted

I think you may just be hearing the transfer case being engaged and the engagement of the front differential. In normal 2wd driving the transfer case is not engaged, but the front drive shaft spins but the front diff is not engaged. So the spinning is not under load.

 

When in 4 auto or 4hi/4lo the transfer case is engaged and there is load being placed on the transfer case and front diff.

 

My 2002 was always "louder" when in 4wd. Same with my 2011 F150. More parts spinning = more sound.

 

I think this is accurate.

 

While it may seem like an electrical noise, it is most likely the drive line under load.

 

As a heavy haul truck driver, I can tell you that drive-lines can make all kinds of different noises. The variables are huge. Tire temperature, road surface temperature and texture, type of tread, wind, load, all kinds of things.

Willshire Enthusiast

Willshire

Posted
Posted

The way Ford and dodge do their auto 4wd is different than gm. If gm uses an encoder instead of a speed sensing switch like abs then it is possible the encoder is making the noise. Is gms 4wd more dependable than Ford? Idk my 08 was flawless. Some stuff has to be proprietary too and the gm auto 4wd is likely one of those. Being an industrial electrician dealing with servos and encoders all the time, I don't here electric noise any more as I have been over exposed to it and can just shut it out lol. Variable frequency drives have to be the noisiest thing going. A motor on a vfd at slow speed makes this whine too

newdude Senior Enthusiast

newdude

Posted
Posted

 

I think this is accurate.

 

While it may seem like an electrical noise, it is most likely the drive line under load.

 

As a heavy haul truck driver, I can tell you that drive-lines can make all kinds of different noises. The variables are huge. Tire temperature, road surface temperature and texture, type of tread, wind, load, all kinds of things.

 

 

I posted on this topic back in Jan 2014 when I bought the truck.... It still makes the noise in 4 wheel auto and drives me insane. Its almost not worth using 4 wheel auto in the rain or ice because it makes me sick with headaches...

 

I have also recently been hearing a similar noise when my truck is in 2 wheel drive. It occurs under acceleration and sustained highway speeds. The radio does not drown it out either.

 

It doesn't seem like GM cares much about this issue....

 

 

To me it seems like it is coming from the switch and not the TCCM? am I crazy? I tried covering my TCCM with some dampening material but I can still hear it come from the switch

 

 

I don't see how a switch could generate that noise, likely it is the module, but it may sound like it's coming from the switch. We did get to see that they acknowledged the problem at one point, but the solution was to put sound deadening material around the module. The real fix is to replace the module with one that doesn't have an electrical design flaw, but we will never see that happen unless it causes 50 people's trucks to crash

 

 

Just Picked up my brand new 2015 Sierra SLT 4X4 this week and the next day had a huge snowfall, as soon as I put it in 4/auto I have been hearing the same high pitched intermittent chirp as everyone else has mentioned, other then that this truck is by far the quietest I have ever owned so its really makes this noise that much more noticeable.

 

Will definitely mention it to my dealer next time I bring the truck in but from the sounds of it there has been no luck in getting a proper replacement so far....

 

 

Mine does it too. Just noticed it for the first time today when I was researching my drivetrain/diff hum... I love this truck so much - all these issues is so disappointing (and pathetic considering the cost of these trucks).

 

Sent from my Nexus 6 using Tapatalk

I really will never understand why GM doesn't stand behind their product.

 

Sent from my Nexus 6 using Tapatalk

 

 

 

This song and dance is so ridiculous.

 

 

IT IS A NORMAL CONDITION:

 

 

#PIP5261: Faint High Pitched Whine Noise In Auto 4 Wheel Drive - (Jan 29, 2015)

 

Subject: Faint High Pitched Whine Noise In Auto 4 Wheel Drive

 

Models: 2014-2015 Chevrolet Silverado

2014-2015 GMC Sierra

2015 Chevrolet Suburban Tahoe

2015 GMC Yukon, Yukon XL, Yukon Denali 2015 Cadillac Escalade, Escalade ESV

Equipped with 4 wd RPO NQH or NP0

 

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern

Some customers may comment on a high pitched whine noise from the vehicle noticed when driving in auto 4wd. The customer may comment that it is an intermittent noise and no noticeable pattern to when it can be heard.

 

Recommendation/Instructions

The transfer case control module on these vehicles is located next to the accelerator pedal and is not covered by any close out or hush panels.

When the transfer case control module has to move the transfer case actuator motor the higher current passing through the module causes an "electronic buzz or whine" within some of the capacitors in the module that can be heard by some of our customers.

Typically this can only be heard with all accessories and HVAC off and only when actuator movement is required. This does not indicate a concern with the module and should not be replaced to address this concern.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

 

cbunting Enthusiast

cbunting

Posted
Posted

 

I think this is accurate.

 

While it may seem like an electrical noise, it is most likely the drive line under load.

 

As a heavy haul truck driver, I can tell you that drive-lines can make all kinds of different noises. The variables are huge. Tire temperature, road surface temperature and texture, type of tread, wind, load, all kinds of things.

 

negative, please read thru the thread, it is not a driveline issue, it's an electrical noise.

cbunting Enthusiast

cbunting

Posted
Posted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IT IS A NORMAL CONDITION:

 

 

Yes, this has been posted before on this thread. While GM may call this a normal condition, it may be normal to them, but it's certainly not properly designed. The circuit should have been designed to take the higher current without making the noise. They need to fix the design and issue a recall. I don't see them ever doing that, but that is what has to be done.

nadrojcote Senior Enthusiast

nadrojcote

Posted
Posted

Yes, this has been posted before on this thread. While GM may call this a normal condition, it may be normal to them, but it's certainly not properly designed. The circuit should have been designed to take the higher current without making the noise. They need to fix the design and issue a recall. I don't see them ever doing that, but that is what has to be done.

It's not going to be a recall. Recall's are for safety concerns. If they ever do anything about it(which they wont) it would be a TSB.

Willshire Enthusiast

Willshire

Posted
Posted

Anyone had any mechanical issues with the front drivelines? In GMs efforts to be on the cutting edge of driveline technology, the Silicon Valley produced control module makes electronic noise in the circuitry. Can noise filters not be placed in the circuit? We put filters on noisy electronic circuits every day. How much more space is required to filter the noise in the tccm?

 

Anybody excited about the new generation gm PTWA bore sprayed aluminum blocks coming out in 2017-18?

Sierra Jon Enthusiast

Sierra Jon

Posted
Posted

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IT IS A NORMAL CONDITION:

 

 

Apparently. Normal and terrible.

 

Sent from my Nexus 6 using Tapatalk

newdude Senior Enthusiast

newdude

Posted
Posted

Yes, this has been posted before on this thread. While GM may call this a normal condition, it may be normal to them, but it's certainly not properly designed. The circuit should have been designed to take the higher current without making the noise. They need to fix the design and issue a recall. I don't see them ever doing that, but that is what has to be done.

 

Then please Mr. Electrical engineer, go tell them how to do it...

LaserBlueZ71 Enthusiast

LaserBlueZ71

Posted
Posted

Sometimes it makes you wonder what the actual engineering process is, and what GM testing is like.

 

A lot of the 2014/2015 issues and quirks with these trucks should have easily been identified during the testing stages of the design. How could GM spend years developing and testing this truck, and not notice drive line vibrations, loose seats, leaking on star antennas, drive line clunks....I mean come on. These engineers are supposed to be highly intelligent beings. So far, I am not overly convinced.

Willshire Enthusiast

Willshire

Posted
Posted

Sometimes it makes you wonder what the actual engineering process is, and what GM testing is like.

 

A lot of the 2014/2015 issues and quirks with these trucks should have easily been identified during the testing stages of the design. How could GM spend years developing and testing this truck, and not notice drive line vibrations, loose seats, leaking on star antennas, drive line clunks....I mean come on. These engineers are supposed to be highly intelligent beings. So far, I am not overly convinced.

Perhaps it is because the test truck gets more than 48 seconds per component to install, or the QC on the tested part was good but 50 parts later the die was wearing or the part was cockeyed in the mold and it wasn't caught until the next QC which was 950 parts later and by that time the part was already shipped to the factory. My brother works at a Honda feeder plant and said one of the components they make (tie rod or ball joint) came apart right on the assembly line at the build factory. not everything can be protected against. Companies that QC every car: i'm thinking - Ferrari, Lambo, Morgan, Mclaren. 48 seconds on the gm assembly line is not a lot of time to get every component exactly as intended.

 

Although a leaking antenna should be caught as every car is water tested

LaserBlueZ71 Enthusiast

LaserBlueZ71

Posted
Posted

Perhaps it is because the test truck gets more than 48 seconds per component to install, or the QC on the tested part was good but 50 parts later the die was wearing or the part was cockeyed in the mold and it wasn't caught until the next QC which was 950 parts later and by that time the part was already shipped to the factory. My brother works at a Honda feeder plant and said one of the components they make (tie rod or ball joint) came apart right on the assembly line at the build factory. not everything can be protected against. Companies that QC every car: i'm thinking - Ferrari, Lambo, Morgan, Mclaren. 48 seconds on the gm assembly line is not a lot of time to get every component exactly as intended.

 

Although a leaking antenna should be caught as every car is water tested

 

I guess that is true. Mass production is what hurts quality the most.

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