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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Noise and Vibration
172 messages, Last post on Oct 28, 2009 at 1:49 PM
You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram
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I just bought a new 2007 silverado crew cab 4x4. I want to put a set of 20 inch wheels and tires on it. It currently has 17 inch ones on it. The truck has the tpms system and the dealership says I can only use GM approved wheels and tires or my gauges could start malfunctioning. Is this legit or smoke to buy through them. I have seen other trucks and even Hummers with after market wheels, I wonder if they have that problem....Any input would be helpful!
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Replying to: luvnsundays (Oct 27, 2007 7:23 am) Your dealer is blowing smoke. Probably because he want you to buy it from him. Who did you talk to at the dealership?
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Replying to: obyone (Oct 27, 2007 10:21 am) kcram - Pickups Host |
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Experiencing a "trombone" noise from exhaust on cold acceleration load. The noise lasts until the exhaust system has a chance to warm up. After driving for about ten minutes or so the noise will quit. I notice that barometric pressure and humidity variations tend to change the attitude of the noise as well. I had it checked out at one time and was told it is caused by a ceramic ball that is caught in the muffler. My questions are these: For warranty purposes (catalytic is covered and muffler is not,) could this ball have come from the catalytic converter or are there ceramic balls within the make up of the muffler itself? The muffler is the 3" dual inlet - dual outlet and have been told a new one is not available for it but if they could find it it would cost about $500 ? Any help here appreciated! John |
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Replying to: jcee3 (Jan 13, 2007 3:33 pm) |
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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
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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
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Replying to: 1offroader (Nov 10, 2007 8:17 am) 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 |
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Replying to: heathwh (Nov 08, 2007 8:20 pm) Thanks Bob |
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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.
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