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Rattling noise in front end

Anyone else had the problem?

Re: Rattling noise in front end

Postby DaDeO [OP] » Feb 15 2011, 3:30pm

Fight nice guys! No, the only thing I added to the truck was the cap (new,and leaked like a sieve). I don't know, might be connected to the hood. I'll finger it out. I had only 10 miles on the truck, and had a bad module in the door connected to the remote door lock and tire pressure sensors. Took 'em 5 days to figure that one out! At least (knock on wood) my bow ties are still good! Starting to wonder about Chevy! Still have my '96 anyway, in case this one craps out! Later!
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Firing on 4 cylinders [L1]
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Re: Rattling noise in front end

Postby Mikejustowns » Feb 20 2011, 10:17pm

Check this out. I have the same issue in my 2007 NBS LTZ. You should be able to get it under warranty. Doubt I can. It has only gotten worse. Now mine is a squeek. Hopeing to make an appt. tomorrow if the dealer is open.


Take it back to the dealer and reference this TSB #10-03-08-002A

2010 Chevrolet Silverado - 4WD | Sierra, Silverado VIN C/K Service Manual | View All Bulletins | Document ID: 2543370
#10-03-08-002A: Squeak/Creak/Rumble or Rattle Noise from Front of Vehicle During Low Speed Maneuvers in Cold Ambient Temps (Enlarge Upper ID of Strut Jounce Bumper) - (Nov 3, 2010)

Subject: Squeak/Creak/Rumble or Rattle Noise Coming from Front of Vehicle During Low Speed Maneuvers in Cold Ambient Temperatures (Enlarge Upper Inside Diameter (ID) of Strut Jounce Bumper)

Models: 2007-2011 Cadillac Escalade, Escalade ESV, Escalade EXT
2007-2011 Chevrolet Avalanche, Silverado LD, Suburban LD, Tahoe
2007-2011 GMC Sierra LD, Sierra Denali, Yukon, Yukon XL LD, Yukon XL Denali

This bulletin is being revised to add the 2011 model year and clarify the text in the Subject, Condition, Cause and Correction. Please discard Corporate Bulletin Number 10-03-08-002 (Section - 03 Suspension).
Condition

Some customers may comment on a squeak, creak, rumble or rattle noise coming from the front of the vehicle or it may sound like it is coming through the front of the dash, during low speed maneuvers. The noise may be most noticeable in ambient temperatures of 0°C (32°F) or colder. The noise will most likely be heard during small to medium suspension travel such as in parking lot maneuvers, over small bumps, or when stopping.
Cause

This condition may be caused by the front strut jounce bumper inside diameter to the piston rod of the strut experiencing a slip/stick condition during certain cold ambient temperature conditions.
Correction

1. Test drive the vehicle in the same range of ambient temperatures of 0°C (32°F) or colder and the same low speed maneuvers mentioned by the customer in order to verify the concern.
2. Using Chassis Ears, verify that the noise is most noticeable at the upper strut mount area. The concern may be on one or both sides of the vehicle.
3. By jouncing the vehicle, the noise or vibration can be isolated using a stethoscope, and may possibly be felt in the vicinity.
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
5. Remove the LH and RH strut assemblies from the vehicle. Refer to Shock Absorber and Spring Assembly Replacement in SI.
6. Disassemble the coil spring and top mount assembly from each strut. Refer to Shock, Shock Component, and/or Spring Replacement in SI.

Object Number: 2422112 Size: LF
Click here for detailed picture of above image.
7. Remove the jounce bumper (5) from the top mount assembly (3).
8. Secure the jounce bumper upright in a bench vise. Only clamp the lower portion of the bumper to allow the upper portion of the ID to remain at rest.

Object Number: 2414939 Size: SH
Click here for detailed picture of above image.

Note: A standard drill bit will not cut the ID of the jounce bumper. The jounce bumper will comply and stretch around the bit, then return after the drill is removed.
9. Prepare a single flute countersink bit or a bladed cutting bit, or equivalent, in a die grinder, Dremmel Tool, or equivalent.

Object Number: 2422094 Size: SH
Click here for detailed picture of above image.

Note: Do Not attempt to drill out the jounce bumper while attached to the strut top mount assembly. The bumper must be removed from the top mount assembly.

Note: Do Not attempt to drill out the jounce bumper from the lower end toward the upper end, as this could affect characteristics of the jounce bumper.

Enlarge the Upper ID (1) from the top side of the jounce bumper to the following dimensions:
• Diameter of enlarged ID: 16 mm
• Depth of enlarged ID: 15 mm

Object Number: 2414196 Size: SH
Click here for detailed picture of above image.
10. Ensure that the ID of the jounce bumper is as smooth as possible and free of loose material. If necessary, an Exacto knife, or equivalent, can be used to carefully trim the edge and remove any loose material. The photo above shows a jounce bumper with the enlarged upper ID (1) as compared to the original ID (2).

Note: Ensure that the jounce bumper is fully seated to the top mount assembly.
11. Install the jounce bumper to the top mount assembly. Ensure that the jounce bumper is secure to the top mount.
12. Assemble the coil spring and top mount to each strut. Refer to Shock, Shock Component, and/or Spring Replacement in SI.
13. Install the LH and RH strut assemblies to the vehicle. Refer to Shock Absorber and Spring Assembly Replacement in SI.
14. Move the vehicle outdoors to allow it to return to ambient temperature.
15. Test drive the vehicle under the same conditions to verify the repair.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation


Description


Labor Time

E9516*


Enlarge ID of Front Strut Bumper - Both Sides


1.3 hrs**

*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.

**The labor time includes test driving the vehicle.
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Firing on 3 cylinders [L1]
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Re: Rattling noise in front end

Postby Mikejustowns » Feb 20 2011, 10:19pm

P.S. took from Chevy-Forum.Net. Cant take credit for this one. Just did a quick Google.
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Re: Rattling noise in front end

Postby DaDeO [OP] » Feb 22 2011, 11:15pm

Hey, thanks Mike (?). Very well could be the problem! I'll have to pay more attention to the temp. thing. Today it didn't do it when I went out. That's what'll happen when I take it to the dealer! Also the guys mentioned their bowties crapping up--- just noticed mine are going too! Thanks again, DaDeO
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DaDeO
Firing on 4 cylinders [L1]
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Re: Rattling noise in front end

Postby Mikejustowns » Feb 23 2011, 12:08am

Hey no problem! Good luck. Getting mine fixed Saturday!
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Firing on 3 cylinders [L1]
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Re: Rattling noise in front end

Postby DaDeO [OP] » Feb 23 2011, 3:49pm

So they heard it?
Fix
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Repair
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Original Poster
DaDeO
Firing on 4 cylinders [L1]
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Joined: Jun 11 2010, 9:29pm
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Re: Rattling noise in front end

Postby Mikejustowns » Feb 25 2011, 1:53pm

Haha yeah they did. They want to drive it and then open it up to be sure. I'll let you know what they find. Seems to be a common problem. Even when brand new.
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Firing on 3 cylinders [L1]
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Re: Rattling noise in front end

Postby EKinMN » Feb 25 2011, 1:56pm

After I said I have not had an issue, I heard that sound. When I read the bulletin here, I was convinced. I will have mine looked at the next time I am in for service.
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Re: Rattling noise in front end

Postby Mikejustowns » Feb 25 2011, 2:17pm

Mine started like that and now its a squeek too. I can rock the truck from side to side and it does it. I mean this is a 30 thousand dollar truck that sounds like a farm tractor going down the road. I hate it. Can't wait to get it fixed. I have an 07 so I hope its under warranty.
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Firing on 3 cylinders [L1]
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Posts: 38
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Joined: Nov 14 2010, 5:46pm
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Re: Rattling noise in front end

Postby DaDeO [OP] » Feb 25 2011, 6:31pm

I went to the service dept. and told the guy my "bowtie" was starting to get dark spots all over it, and asked if he was aware of a problem, and he says "yeh, we've changed a few" (read many!) He said they'd replace it ,but they had to order one. Then I dropped the service bulletin on him, and he said he hadn't seen that! I said, "well you have now, and I'm having the condition mentioned". He said that when the "bowtie" comes in they'd take care of everything. Funny, he didn't even look at the emblem and took my word on the rattling problem. BTW, my wife's Malibu had a problem with noises in the front end, but all they did was squirt some lube in somewhere. I'm thinking it could be the same problem that I have. Let me know how you make out!
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DaDeO
Firing on 4 cylinders [L1]
Firing on 4 cylinders [L1]
Posts: 44
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Joined: Jun 11 2010, 9:29pm
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Extra Info: 5.3L 4X4 Ext cab
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