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Whistling noise


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#1 SteveSierra

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Posted 04 March 2005 - 02:44 PM

GMTech -
I saw a post at automotivehelper.com where someone said their Denali made
a whistle noise from 25 - 75. I saw your response about it probably being the front drive shaft.
I have this noise, and I've test driven another 05 Sierra Crew Cab that had this same exact noise. Is there anywhere I can print out the tsb information(I know service techs hate that, but I at least want to throw them a bone)?
Have you tried other fixes with any success?
I want the dealer to fix it right the first time(actually, this will be the second time)
and not have to worry about this anymore. How can I go about politely getting the service guys to check on tsb 03-04-17-005 and suggesting the replacement of the front drive shaft?
Thank you! :D
Steve

#2 GM-Tech

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Posted 04 March 2005 - 03:36 PM

Lets back up a bit. I don't think I've ever even heard of automotivehelper.com let alone responded to something there. :D

I'll include the TSB you mentioned, but I'm not sure this is your concern. Can you supply more explicit details? This is not a concern anyone has every come in here with, that I'm aware of, so I have no tips at this point. Perhaps with more info I may be able to point you in the right direction.

Here's the TSB...

Whine Noise From Front Axle (Diagnose and Replace Front Propeller Shaft with a Tuned Internally Dampened Front Propeller Shaft) #03-04-17-005 - (Mar 13, 2003)
Whine Noise from Front Axle (Diagnose and Replace Front Propeller Shaft with a Tuned Internally Dampened Front Propeller Shaft)
2002-2003 Cadillac Escalade, Escalade EXT

2000-2003 GMC Yukon Denali, Yukon XL Denali

2001 GMC Sierra C3

2002-2003 GMC Sierra Denali

with AWD Transfer Case (RPO NP3 or NR3)

Condition
Some customers may comment on a slight whine noise from the front of the vehicle during light throttle conditions, typically at two vehicle speed ranges of 64-80 km/h (40-50 mph) and 112-129 km/h (70-80 mph).

Cause
"Inherent" ring and pinion gear whine.

All gear driven units, such as automotive rear axles, produce some level of noise that cannot be eliminated with conventional adjustments and repairs. "Inherent" axle noise can be described as a slight noise heard only at a certain speed on most General Motors® trucks. The presence of this noise is not indicative of a functional concern with the axle assembly. However, some customers may find that this "inherent" axle noise is unacceptable.

Correction
Replace the front propeller shaft with an internally tuned dampened shaft ONLY after diagnosis concludes that it is an "inherent" front axle noise and no physical damage or incorrect adjustment exists.


Diagnostic Information and Procedure for Front Axle Noise


• Diagnostic Starting Point - Front Drive Axle (Refer to SI Document ID #696970).

• Symptoms - Front Drive Axle (Refer to SI Document ID #696957).

• Front Drive Axle Noises (Refer to SI Document ID #700621).

• Noisy in Drive (Refer to SI Document ID #700622).

• Noisy When Coasting (Refer to SI Document ID #700624).

• Intermittent Noise (Refer to SI Document ID #700625).

• Constant Noise (Refer to SI Document ID #700631).

• Noisy on Turns (Refer to SI Document ID #700634).


Front Propeller Shaft Replacement


Raise the vehicle. Refer to Lifting and Jacking the Vehicle (SI Document ID #737171).
Important: Before disassembly, observe and accurately mark all of the driveline components relative to the propeller shaft and to the axles. These items include the following components:


• The propeller shafts

• The wheel drive shafts

• The pinion flanges

• The output shafts

Assemble all of the components in the exact relationship to each other prior to removal. Observe all published specifications and torque values and any measurements obtained prior to disassembly.


Remove the transfer case shield, if equipped.



Remove the clamp (if applicable) (4) at the transfer case (3) by prying up the exposed end of the clamp (4) with a flat-bladed tool.



Remove the bolts (6) and the yoke retainers (7) from the front axle pinion yoke (1).
Notice: When removing the propeller shaft, do not attempt to remove the shaft by pounding on the yoke ears or using a tool between the yoke and the universal joint. If the propeller shaft is removed by using such means, the injection joints may fracture and lead to premature failure of the joint.

Disconnect the propeller shaft (2) from the front axle pinion yoke (1).
Remove the propeller shaft (5) from the transfer case output shaft by sliding the propeller shaft forward.
Inspect the splines of the transfer case output shaft for a sufficient coating of lubricant. If the output shaft does not have a sufficient coating of lubricant, lubricate the shaft with lubricant, P/N 12345879 (Canadian P/N 10953511), or with an equivalent lubricant meeting GM specification 9985830.
Important: Some old driveshaft boots may only use a single clamp design. When installing the new propeller shaft, use ONLY a two clamp boot.


Install the new clamp, P/N 26064275, supplied with the new propeller shaft, P/N 15186002, into the groove of the propeller shaft boot.
Install the propeller shaft splines into the transfer case output shaft.
Install the propeller shaft to the front axle pinion yoke.
Install the yoke retainers and the bolts.

Tighten
Tighten the yoke retainer bolts to 25 N·m (19 lb ft).

Install the boot onto the transfer case output shaft until the boot is attached into the groove on the output shaft.



Using the J 43218 , crimp the clamp until the dimensions that are shown are obtained.
Install the transfer case shield, if equipped.
Install the transfer case shield mounting bolts, if equipped.

Tighten
Tighten the transfer case shield mounting bolts to 20 N·m (15 lb ft).

Lower the vehicle.
Parts Information
Parts are in limited quantities. DO NOT order parts for stock.

Part Number
Description
Qty

15186002
Propeller Shaft, Front
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

F1200
Propeller Shaft, Front Of Transfer Case - Replace
Use published labor operation time




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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#3 SteveSierra

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Posted 04 March 2005 - 03:43 PM

Thanks! :D Here's where I got that from. And after re reading it, it was a poster named GMCTech :D
http://www.automotiv...topic202211.htm

#4 GM-Tech

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Posted 04 March 2005 - 04:16 PM

Thanks! :D  Here's where I got that from.  And after re reading it, it was a poster named GMCTech  :D


I see him post here occasionally under the same name. You might want to ask him if he has experience with this problem. Haven't seen it myself, but I know what they're talking about in TSB.

#5 a10rplyr

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Posted 04 April 2006 - 04:04 PM

SteveSierra:
Were you able to get this problem resolved?


GM-Tech:
I have what sounds like the same problem in my 2006 Silverado Crew Cab and the dealer hasn't been able to fully correct the problem. I'm trying to figure out if this could be applicable to newer models too.

Thanks a lot for any information you have!

#6 ChevyTech007

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Posted 04 April 2006 - 08:58 PM

This might be what "ya'll" are fighting. I have run into this!!

Subject: Whistle Noise from the Throttle Body Area on Light Throttle Acceleration - kw idle intake manifold off accelerate GMT305 GMT360 GMT370 GMT800 GMT805 GMT806 GMT820 GMT830 #PIP3086A - (01/06/2005)



Models: .




--------------------------------------------------------------------------------

.
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:
Some of the vehicles listed may exhibit a whistle noise from the throttle body area during light acceleration if they are equipped with a GEN III engine and an electronic throttle body.

Recommendation/Instructions:
This is a normal noise characteristic that could be experienced on these vehicles if they have an electronic throttle body. The same intake manifold design is used whether the engine has an electronic throttle body or a mechanical throttle body. Due to this, electronic throttle body engines still have an IAC passage in the intake manifold. The whistle noise may be the result of an airflow disturbance that can occur as incoming air contacts the unused IAC passage.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

.

Models:
(04 05 Buick Rainier S1, T1) and (03 04 05 Chevrolet Trail Blazer EXT S1, T1) and (03 04 05 GMC Envoy XL XUV S1, T1 01 02 03 04 05 Cadillac Escalade C1, C6, K1, K6 02 03 04 05 Chevrolet Avalanche C1, K1, C2, K2 01 02 03 04 05 Chevrolet Silverado Truck C1, K1, C2, K2, C3, K3 01 02 03 04 05 Chevrolet Tahoe C1, K1 01 02 03 04 05 Chevrolet Suburban C1, K1, C2, K2, C3, K3 01 02 03 04 05 GMC Sierra Truck C1, K1, C2, K2, C3, K3 01 02 03 04 05 GMC Yukon C1, K1 01 02 03 04 05 GMC Yukon XL C1, K1, C2, K2, C3, K3 03 04 05 Hummer H2 N2)
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