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1497 messages,  Last post on Oct 17, 2006 at 8:34 PM

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

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#1321 of 1497 Re: High Pitch Noise [27north] by socaljoe Jun 05, 2006 (9:47 pm)
Replying to: 27north (Jun 05, 2006 8:39 am) It could be coming from the rear, have the rear differential checked out Replies to this message: p100 (Jun 07, 2006 6:21 am)
#1322 of 1497 Re: High Pitch Noise [socaljoe] by p100 Jun 07, 2006 (6:21 am)
Replying to: socaljoe (Jun 05, 2006 9:47 pm) Typically, defective rear differentials will whine in certain speed range, typically between 45-50 MPH in top gear. The whine can be heard under load or only during coasting. Most of the time, whis whining is caused by escessive backlash setting (play between gear teeth).   He could have a defective bearing on one of the idler pulleys, water pump , or the alternator. Recommend removing the serpentine belt and runnning the engine with the truck in park for several seconds, including higher RPMs to see if the noise disappears.
#1323 of 1497 High Pitch Noise by 27north Jun 07, 2006 (9:42 am)
Thanks for the help, the noise is clearly coming from the front end. I will try to find a defective bearing as p100 suggested. Replies to this message: tubby (Jun 07, 2006 11:58 am)
#1324 of 1497 Re: Sticky throttle [pickles077] by tubby Jun 07, 2006 (11:44 am)
Replying to: pickles077 (Apr 30, 2006 7:27 am) To help some of yall the throttle body gets dirty and I think due to the pvc that enters the intake close to the throttle body. You can get a can of throttle body cleaner from any auto parts store and in about 5 min clean the butterfly assy. but you might have to do it every now and then. I have 157000mi on mine and have done it 4-5 times.
#1325 of 1497 Re: High Pitch Noise [27north] by tubby Jun 07, 2006 (11:58 am)
Replying to: 27north (Jun 07, 2006 9:42 am) I hope this helps, if it is your front wheel bearing it will not help trying to find it. GM went to a hub cassette about 6-7 years ago on the 2wd vehicles. It is all in one assembly. My work neighbor tried to replace the inner and outer bearings on his 99 but it has the 00 front end and the cassette.    If you have the hub cassette it is a bit pricy but easy to repair. good luck
#1326 of 1497 Re: 2003 Silverado blower motor [p100] by n4cer340 Jun 09, 2006 (9:21 am)
Replying to: p100 (May 26, 2006 6:59 am) Just got it back from the dealer - it was a defective heater control module $ 130.00. The service rep said it may have been caused by boosting another vehicle causing a spike in voltage when the other vehicle finally started. Not sure if I believe it but, it works now.   FYI:::::
#1327 of 1497 whining noise by p100 Jun 12, 2006 (9:49 am)
My '06 Crew cab Z71 with the 5.3 engine has a faint but distinct whine coming from somewhere in the engine compartment when the RPMs are about 1200 and above. It is not there when the engine is idling. The whine is engine RPM related - it occurs when the truck is idling in park or neutral, both with cold and hot engine. The noise is not loud, but nevertheless it is there. Is this normal? Anybody else has encountered anything similar? I am going to check a few things, so far I have not been able to pinpoint the source. It could be the A/C compressor pulley bearing, alternator bearing, idler or belt tensioner bearing, or the water pump/power steering pump bearing. Or transmission oil pump/converter? Replies to this message: geo9 (Jun 13, 2006 5:32 am) p100 (Jun 13, 2006 10:50 am)
#1328 of 1497 Re: power window isssues [tburns6] by rickar Jun 12, 2006 (10:40 am)
Replying to: tburns6 (Apr 15, 2006 6:54 am) I'm having the exact same problem with my 2000 Silverado 2500. Does anyone have any clue what might be causing this?
#1329 of 1497 Re: whining noise [p100] by geo9 Jun 13, 2006 (5:32 am)
Replying to: p100 (Jun 12, 2006 9:49 am) P..........My 04 6.0 does the same thing so does my buds 04 1500 5.3 ! Nature of the beast from what I read on the GM truck forums.................. Replies to this message: p100 (Jun 13, 2006 10:50 am)
#1330 of 1497 Re: whining noise [geo9] by p100 Jun 13, 2006 (10:50 am)
Replying to: geo9 (Jun 13, 2006 5:32 am) A GM tech told me that 2500 series 4L80 transmission has a whine in the first gear which is supposedly normal. But no such whine for the 4L60 series which I have. Anyway, I am just trying to understand this noise and where it is coming from. My biggest worry is that it may get louder and result in failure of some component or a bearing and leave me stranded.

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