Last post on Jun 16, 2013 at 5:03 PM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck
#1 of 265 noise under hood
Mar 12, 2006 (10:49 am)
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.
Mar 18, 2006 (2:43 pm)
It's called Chevyitis - it basically means you bought the wrong truck. Don't worry - I'm sure a few recalls down the line it will be fixed.
#3 of 265 4.8L Tipping Noise
Apr 17, 2006 (6:08 pm)
I have an 02 silverado it has 79000 miles and the motor makes a tapping sound. It sounds like a lifter, I took it in under warranty and they say that it is typical. They say it is carbon on the pistons. They won't do anything about it. Anyone have this problem and what did you do??
#4 of 265 Re: 4.8L Tipping Noise [gumpp08]
Apr 17, 2006 (11:14 pm)
The engineers at GM have determined that this tapping noise will have no effect on longevity of the motor. That is why the dealer will not do anything. Course they are suppose to explain that to you. Now whether you beleive that or not well that's another story.
BTW, there is a TSB out addressing this and it does state what I've typed above.
#5 of 265 Re: noise under hood [jabo2]
Apr 27, 2006 (7:44 am)
2005 Sierra - same noise - nobody knows what it is.
#6 of 265 Re: 4.8L Tipping Noise [obyone]
May 01, 2006 (9:54 pm)
Actually, the engineers at GM have determined that there is nothing they can do about it because the upper management told them to STFU. It can probably be stated that the tapping noise will make the engine readh the 100k mark, and that's probably good enough for them.
#7 of 265 Re: noise under hood [jamci]
May 03, 2006 (6:53 am)
I had a strange noise under the hood of my old Chevy once while cranking it......mama's cat never was the same after that!!
#8 of 265 Re: 4.8L Tipping Noise [p100]
May 06, 2006 (11:26 am)
Longevity aside, what the engineers and that TSB (GM) do not address is the lost value to the vehicle caused by the tapping. I, and I assume most smart buyers, would not buy one making that noise (without significant discount).
#9 of 265 HIgh pitched sound while driving
Jul 01, 2006 (9:08 am)
My 2002 Silverado 1500 makes a high pitched sound when I start the engine. Although the sound goes away after a few minutes of idling, when I engage the drive and give it gas it starts again and the pitch increases/decreases depending on if I push the gas pedal down/let go. This is when the truck is in motion. Is this the fuel pump?
Thanks in advance for your help.
#10 of 265 Re: HIgh pitched sound while driving [silvertruk]
Oct 05, 2006 (8:23 pm)
Sounds like the serpentine belt is slipping and or you may have a broken or weak tension pully. When you first start it up its under strain because the alternator, water pump and A/c all kick in. Then they get up to speed until you step on the gas and speed everything up. A fuel pump is under a steady pressure. You can check this by taking the belt off and starting it. Just dont run it long. NO Engine COOLING with out the belt on. Also keep in mind if its a bearing in the alternator or water pump it will also go away when you take the belt off. Where is the sound coming from? Under the hood or back Of the truck?