Chevy Silverado and GMC Sierra Noise and Vibration
I have a 2005 Chevy Silverado 1500 crew-cab,2wd.I have a noise coming from under the hood somewhere that sounds kinda like a whining car horn.When you push down on the gas pedal, that's when you hear it.After a few seconds it will go away.I took it in to the dealer and of course they could not find any problem.This is something I listen to everyday,and they could not find or hear the noise 1 time,so they give me a clean bill of health.Is there anyone out there having a similar problem?Thanks.
BTW, there is a TSB out addressing this and it does state what I've typed above.
Thanks in advance for your help.
short bed, 5.3L, 2 wheel drive, 3.23 rear. The
stock exhaust has an irritating low frequency
drone when I give it gas. I have tinnitus and am
very sensitive to noise. I need this thing to be
near silent! There are several options:
1) leave it be for a while and let the muffler
break in. Maybe it'll quiet down.
2) add a resonator (a dynomax super turbo, for
instance) before the muffler, but that would put
it right under the cab.
3) wrap the stock muffler with some kind of sound
4) insulate the cab with acoustic material.
Has anyone else noticed that this automatic
transmission whines under certain conditions?
Other than that I like this truck. Reasonably
quiet (besides the wind noise). It doesn't feel like I'm driving a four story building (F150).
It also puts out relatively low electromagnetic field (EMF) emissions. For other truck EMF ratings see, www.ahappyhabitat.com
Warning to Toyota Tundra drivers: You are being exposed to a good deal of EMF.
If you do a search for "steam teapot" on the forum you will see someone else had the issue, but did not leave me a way to reply. He had a newer truck also.
If you search on "Driveline Vibration/Growl Noise" (msg# 329) there looks like there is a TB on reprogramming the PCM. I just started looking into this issue and the TB mentions something about the torque converter clutch exciting various driveline components.
Other than the noise, I have not noticed any other symptom or side effects.
Let me know if anyone else discovers additional info.
GMC Sierra: Problems & Solutions
msg# 329 - Tech Bulletin
msg# 1454 - Other post about issue.
Driveline Vibration/Growl Noise (Reprogram PCM) #99-07-30-024
Driveline Vibration/Growl Noise (Reprogram PCM)
2000 Chevrolet and GMC C/K Utility and Pickup Models (Silverado and Sierra)
with 4.8 L or 5.3 L Engine (VINs V, T -- RPOs LR4, LM7)
and Hydra-Matic 4L60-E Transmission (RPO M30)
Some customers may comment about a driveline vibration/growl noise at speeds between 56-80 km/h (35-50 mph) with low engine speeds.
Engine torsional vibration when the torque converter clutch is engaged at low engine speeds, 1100-1400 RPM, can excite various driveline components. These driveline disturbances can cause noises and vibrations that the driver may feel and/or hear.
Reprogram the Powertrain Control Module (PCM) with the calibrations listed in this bulletin.
First time to this site and all I will say is wow there is enough awesome info. here to keep me up way too late at night learning. Anyway I shall be purchasing a new Silverado by the end of January and was very interested of course in finding out if anyone out there has or is going to be doing the same and what the heck people are paying for these expensive machines. I have invoice and MSRP already but I don't have anyone in the business so I won't be getting any "plan" discounts. Any help would be great. Thanks ya'll.
As I returned to my already running truck I noticed a humming/buzzing sound coming from right behind the driver side , where the cab meets the bed of my truck.
To give a better idea of what kind of noise it was making imagine a leaf blower from a hundred yards away.
I drive my truck for a living and have 180,000+ miles on it already.
Does anyone have an idea of what this sound could be?
Thx in advanced for any help.
my buddy suggested it was the fuel pump as well but I wanted to get some confirmation from a third party before getting it fixed...
Anyone experienced the same thing? Thanks in advance.
kcram - Pickups Host
At speeds above 50mph I hear what sounds to me like something binding then releasing and then there is a clucking noise. I checked and everthing seems tight under the frontend. I also have put it in 4HI and 4LO thinking that maybe the 4 wheel drive didn't completely disengage. Any suggestions on what to check next?
File In Section: 04 - Driveline Axle
Bulletin No.: 99-04-21-004A
Date: September, 2001
This bulletin is being issued to advise dealerships to no longer flush and replace the transfer case fluid when a customer comments about a "bump" feeling when the vehicle accelerates from a stop.
When Corporate Bulletin Number 99-04-21-004 was issued, a new transfer case fluid had just been developed to correct this condition. Currently, a nickel-plated slip yoke is being developed that will correct this condition. A new bulletin will be issued as soon as parts are available.
I would start by replacing the transfer case fluid and checking to see if the transfer case chain is stretched.
The new yoke for the driveline doesn't seem to be available yet, so I would remove the driveline and get some lube for the slip yoke from your GM dealer and lube it real good and re-install it. The clunk may be from the slip yoke hanging up on the splines.
I was driving on a newer flat concrete expressway at approximately 65-70 mph. The entire truck started shaking violently with the steering wheel almost jumping our of my hands. Pulled over, checked all tires, roadway, nothing amiss. No warning lights came on. Once I started again, nothing has recurred (at any speeds). Could this be the torque converter starting to go bad?