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Chevy Silverado and GMC Sierra Noise and Vibration

172 messages,  Last post on Oct 28, 2009 at 1:49 PM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

#87 of 172 Re: I need help from an expert on a noise my 03 Silverado is making. [jcee3] by hammbone76 Nov 09, 2007 (6:18 pm)
Replying to: jcee3 (Jan 13, 2007 3:33 pm) My 2000 Silverado does the same humming noise from the tank. I was real nervous first time I heard it. Been doing it for about 2 years now, and I have 150,000 miles. It is definitely the fuel pump when the fuel level gets low. As long as I have about 5 gallons in my tank I don't hear it, but it gets louder as the fuel level gets lower. Sounds AWFUL when I've only got a couple of gallons! Good way to know you need fuel if you aren't paying attention to the gauge I guess!
#88 of 172 muffler noise by 1offroader Nov 10, 2007 (8:17 am)
citizen   It is my understanding that the catalytic is filled with ceramic balls/beads that are coated in platinum (???). That is why they are expensive. The exhaust emissions are reduced by a chemcial reaction that takes place on the surface of those little balls.   Mufflers do not have those balls inside them. Mufflers are just a way to reduce the sound, and are filled with various chambers and baffles to accomplish that. Maybe it is possible that one of the little balls escaped the cat and got into the muffler. The balls are not very big, it seems odd that such a tiny thing could cause a big noise. Call around to some muffler shops and see what they say.   1offroader Replies to this message: citizen48 (Nov 12, 2007 4:12 pm)
#89 of 172 Harmonic Vibration on 96 Silverado by heathwh Nov 08, 2007 (8:20 pm)
Hi, this is my first time posting on this forum. It seems like there are lot of knowledgeable people on this site so I hope you can help me identify my problem. I just bought a 96 Silverado. It has a harmonic vibration that occurs around 1700 RPMs and is most noticeable under heavier loads although it can be detected in neutral. I assume it is either the harmonic balancer or flywheel. Both the engine and transmission were rebuilt, but I don't have any information on those repairs. Any guess as to which or is there something else I'm not considering.   Thanks in advance,   Bill Replies to this message: rkice14 (Nov 20, 2007 11:58 am)
#90 of 172 Re: muffler noise [1offroader] by citizen48 Nov 12, 2007 (4:12 pm)
Replying to: 1offroader (Nov 10, 2007 8:17 am) offroader,   Thanks, unbelievably enough the trombone noise goes away completely during times of dry weather and low humidity but immediately returns after a good rain or in times of high humidity. I think this may help attribute to the loud noise as condensation is in there with the pebble, plus it's probably rolling around in there as well, changing the attitude .........definitely a strange aberration indeed.   The fact that the muffler contains no ceramic balls is huge ammunition in getting this thing fixed within my 80,000mi exhaust emissions warranty.   BTW it was dealer that told me that it was a ceramic ball originally .   May be a battle but will keep the board apprised   thanks,   John
#91 of 172 Re: Harmonic Vibration on 96 Silverado [heathwh] by rkice14 Nov 20, 2007 (11:58 am)
Replying to: heathwh (Nov 08, 2007 8:20 pm) Hello also my first post in this forum. I have a 1997 gmc suburban with a 5.7 (122,000miles) with what sounds like the same problem. During light acceleration, or anytime that the engine would be under load. . . vehicle traveling around 40 or so MPH . . ..hear a light growling kinda sound, and feel a light vibration. The problem just started out if the blue, it seems to be worst when its colder. I've found several posts in several different forums but no solutions yet.   Thanks Bob
#92 of 172 Engine Noise by fenhoff Nov 28, 2007 (4:00 pm)
Have a 2005 Silverado 1500 V6. Keep getting a steady chirping noise, seems to go away if vehicle is warm and idle. Once I accelerate the chirping noise comes back. I have changed out the serpentine belt, tensioner, and idle pulley. Got no clue, no engine lights are on, fluids all seem steady and no leaks that I’m aware of. Replies to this message: mpam76 (Nov 08, 2008 6:01 pm)
#93 of 172 2005 3500 Silverado by fldiesel Dec 19, 2007 (5:55 am)
I have a 2005 Silverado dually with the 8.1 engine. It presently has 5400 miles on it. At 4600 miles it developed a drive train vibration that comes at 1200 rpm for a few seconds, back at 1800 rpm and back super bad at 2600 rpm. When I tow my camper it seems to hover at 2600 rpm just before shifting and at that point you can not see out of the mirrors. It tickles your ears and is very uncomfortable until it shifts, which at times is a few minutes. The dealer disconnected everything on the front of the engine as well as the torque convertor. The vibration was still present, so they replaced the harmonic balancer. When I got it back, it now is worse. Has anybody else ever had the same problem? GM now claims since nothing is broken, they can't fix it and it is "probably" a design flaw. Replies to this message: obyone (Dec 19, 2007 9:15 am) fldiesel (Dec 19, 2007 4:41 pm) obyone (Dec 19, 2007 6:02 pm)
#94 of 172 Re: 2005 3500 Silverado [fldiesel] by obyone Dec 19, 2007 (9:15 am)
Replying to: fldiesel (Dec 19, 2007 5:55 am) Was it GM that claimed that it is a design flaw or the dealer?   Personally, I'd go to another dealer. Replies to this message: fldiesel (Dec 19, 2007 4:41 pm) obyone (Dec 19, 2007 6:02 pm)
#95 of 172 Re: 2005 3500 Silverado [obyone] by fldiesel Dec 19, 2007 (4:41 pm)
Replying to: obyone (Dec 19, 2007 9:15 am) It was the dealer that claimed it could be a design flaw. The closest dealer not associated with the local one is 65 miles away. Not convienent, and they want me to drop it off for a few days. When I called GM customer service, the person was nice and asked me what I wanted from GM. I said just to fix the vibration. Then she asked for me to hold on while she contacted the dealer that worked on it and when she returned to the phone, she transformed into a less than nice person, and ended it with words like, "I'll close this case and mark it that you aren't satisfied with the results." She is right, and my next call will be to BBB in Washington DC. Here we go!!! Replies to this message: obyone (Dec 19, 2007 6:02 pm)
#96 of 172 Re: 2005 3500 Silverado [fldiesel] by obyone Dec 19, 2007 (6:02 pm)
Replying to: fldiesel (Dec 19, 2007 4:41 pm) Once you file with the BBB and a buyback is initiated there will be another phone call from a GM rep. One that handles buyback and lemon law cases. They will offer you a free extended warranty to drop your claim. Course how you proceed after that is up to you. That warranty that they offer is the Major Guard bumper to bumper 100K/ 5 year no deductible worth around 2.5-3K.   good luck on whichever you decide.

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