Leaf Spring Tsb?

[anonemouse]

I have an '02 GMC Sierra that's making noise in the back end when I come to a complete stop and when it shifts as I accelerate normally. It's like a "clunk" just as I release the brake to begin accelerating and seems to be getting worse. I thought perhaps it was the slip-yoke, but that seems to be fine. I thought I saw part of a TSB that mentioned a potential problem with the leaf springs. Anyone know about this?

 

Anon

[bobcat5544]

Document ID# 2035127

2002 Chevrolet Chevy K Silverado - 4WD

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Subject: Squeak Noise From Rear of Vehicle (Lubricant Rear Leaf Springs) #06-03-09-004A - (10/31/2007)

Models: 1999-2007 Chevrolet Silverado (Classic)

2007-2008 Chevrolet Silverado

1999-2007 GMC Sierra (Classic)

2007-2008 GMC Sierra

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This bulletin is being revised to add the 2008 model year and include new style pickups models. Please discard Corporate Bulletin Number 06-03-09-004 (Section 03 -- Suspension).

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Condition

Some customers may comment about a squeak noise coming from the rear of the vehicle. During normal operation, certain vehicles may exhibit a squeaking noise that may be traced to the rear leaf springs. While this noise is an operating characteristic of leaf springs, the frequency and severity of this noise will be affected by the roads that the vehicle is driven on.

 

Cause

This condition may be due to debris getting between the leaf springs.

 

Correction

To correct this condition, lubricate the rear leaf springs using the following procedure.

 

Important: It has been found that the application of grease to the rear leaf springs does a better job of preventing the noise from reoccurring than replacement of the spring.

 

Raise the vehicle on a frame lift-type hoist.

Inspect the springs for damage. If none is found, proceed to the next step.

Pressure wash the rear leaf springs to remove as much dirt and grit as possible.

Dry the springs with compressed air.

 

Apply a liberal amount of grease, P/N 12345996 (in Canada, use P/N 10953501), under the front and rear tip inserts for the #2 and #3 leaves, on top of the tip inserts, and in between the #1 and #2, and #2 and #3 leaves, as indicated below. A screwdriver can be used to gently pry up the tip insert; however, a rag around the screwdriver must be used to prevent damage to the spring. Use a flat-bladed tool, such as a gasket scraper to properly distribute the grease.

Lower the vehicle to the ground and test drive to verify the repair.

Please inform the customer that this will offer relief, it is by no means a lifetime repair. Periodic cleanings and grease re-application may be necessary throughout the life of the vehicle.

 

For 1500 Series (½ ton) models only: On vehicles built prior to October 2004, if the above procedure does not correct this noise, it could be caused by an incorrectly dimensioned splay clip (the band holding the ends of the leafs together) that interferes with the leaf springs. A 5 mm (0.197 in) wider splay clip was introduced in early 2005 model year to provide additional clearance. To correct this concern, replace the rear leaf spring assembly. There was no change to the part number.

 

OR

 

Document ID# 1999324

2002 Chevrolet Chevy K Silverado - 4WD

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Subject: Rear Leaf Spring Slap or Clunk Noise (Replace Spring Inserts) #03-03-09-002B - (07/23/2007)

 

Models: 1999-2008 Chevrolet Silverado 1500/2500 Series Pickups

2000-2008 Chevrolet Suburban 2500 Series

2002-2008 Chevrolet Avalanche 2500 Series

2003-2008 Chevrolet Express 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)

1999-2008 GMC Sierra 1500/2500 Series Pickups

2000-2008 GMC Yukon XL 2500 Series

2003-2008 GMC Savana 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)

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This bulletin is being revised to add model years and update the Parts Information. Please discard Corporate Bulletin Number 03-03-09-002A (Section 03 -- Suspension).

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Condition

Some customers may comment on a rear leaf spring slap or clunk noise. This noise is most apparent when the vehicle is operated over irregular road surfaces.

 

Correction

Important: DO NOT disassemble the main pack on the leaf spring or remove the bushing from the spring.

 

(1) Insert -- P/N 15604067

(1) Insert -- P/N 15247030

 

Verify that the rear leaf spring inserts (1) are present on the leading and trailing ends of the overload spring (second stage leaf). The insert may have broken apart from wear and fallen out. If the inserts are not present, install new ones.

 

Important: On some models, the vehicle may have to be raised to allow the springs to separate enough so the insert can be installed.

 

Parts Information

Important: Technicians should refer to the Parts Catalog when ordering the insert.

 

Part Number

Description

 

15604067

Insert, Rear Spring Leaf

 

15247030

Insert, Rear Spring Leaf

[anonemouse]

Thanks for the information. However, the noise in a "clunk" that can be felt rather than a "squeak".

 

Anon

[bobcat5544]

The post I made contains 2 bulletins one of squeak and the second for slap/clunk noise

 

Document ID# 1999324

2002 Chevrolet Chevy K Silverado - 4WD

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Subject: Rear Leaf Spring Slap or Clunk Noise (Replace Spring Inserts) #03-03-09-002B - (07/23/2007)

 

Models: 1999-2008 Chevrolet Silverado 1500/2500 Series Pickups

2000-2008 Chevrolet Suburban 2500 Series

2002-2008 Chevrolet Avalanche 2500 Series

2003-2008 Chevrolet Express 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)

1999-2008 GMC Sierra 1500/2500 Series Pickups

2000-2008 GMC Yukon XL 2500 Series

2003-2008 GMC Savana 2500/3500 Vans with 8500 GVWR (RPO C5F), 8600 GVWR (RPO C6P) or 9600 GVWR (RPO C6Y)

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

This bulletin is being revised to add model years and update the Parts Information. Please discard Corporate Bulletin Number 03-03-09-002A (Section 03 -- Suspension).

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

Condition

Some customers may comment on a rear leaf spring slap or clunk noise. This noise is most apparent when the vehicle is operated over irregular road surfaces.

 

Correction

Important: DO NOT disassemble the main pack on the leaf spring or remove the bushing from the spring.

 

(1) Insert -- P/N 15604067

(1) Insert -- P/N 15247030

 

Verify that the rear leaf spring inserts (1) are present on the leading and trailing ends of the overload spring (second stage leaf). The insert may have broken apart from wear and fallen out. If the inserts are not present, install new ones.

 

Important: On some models, the vehicle may have to be raised to allow the springs to separate enough so the insert can be installed.

 

Parts Information

Important: Technicians should refer to the Parts Catalog when ordering the insert.

 

Part Number

Description

 

15604067

Insert, Rear Spring Leaf

 

15247030

Insert, Rear Spring Leaf

[anonemouse]

Of course. I see it now. Thank you!

 

Anon