Squeak Noise from Rear of Vehicle (Lubricate Rear Leaf Springs) – 1999-2019 Chevrolet & GMC

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Service Bulletin Bulletin No.: 06-03-09-004M
Date: June, 2019
TECHNICAL
Subject: Squeak Noise from Rear of Vehicle (Lubricate Rear Leaf Springs)
Models: 1999 – 2007 Chevrolet Silverado (Classic)
2007 – 2013 Chevrolet Silverado 1500
2007 – 2019 Chevrolet Silverado 2500/3500
2014 – 2019 Chevrolet Express
1999 – 2007 GMC Sierra (Classic)
2007 – 2013 GMC Sierra 1500
2007 – 2019 GMC Sierra 2500/3500
2014 – 2019 GMC Savana
2007 – 2010 HUMMER H3, H3T
Attention: This Bulletin also applies to any of the above models that may be Export from North
America vehicles.
This Bulletin has been revised to add 2019 model year. Please discard Corporate Bulletin
Number 06-03-09-004L.
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.
1. Raise the vehicle on a frame lift-type hoist.
2. Inspect the springs for damage. If none is found,
proceed to the next step.
3. Pressure wash the rear leaf springs to remove as
much dirt and grit as possible.
4. Dry the springs with compressed air.
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Note: Ensure any tool used to gently pry the tip inserts
or spring leaves is protected to prevent damage to the
spring leaves.
5. Apply a liberal amount of grease, P/N 19356408 (in
Canada, use P/N 19356409), both underneath and
on top of the front and rear tip inserts for the #2 and
#3 leaves, as indicated above. A screwdriver can
be used to gently pry up the leaf; however, a rag
around the screwdriver must be used to prevent
damage to the leaf. Use a flat-bladed tool, such as
a gasket scraper or a brush to properly distribute
the grease at least 6 inches from each end of
the leaf.
6. Lower the vehicle to the ground and test drive to
verify the repair.
Please inform the customer that this will offer relief, but
is not a lifetime repair. Periodic cleaning 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.
Parts Information
Part Number Description Qty
19356408
(in Canada,
use 19356409)
Lubricant 2
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation Description
Labor
Time
8080008*
Lubricate Rear Leaf Springs-LD 0.5 hr
Lubricate Rear Leaf
Springs-HD 0.9 hr
*This is a unique Labor Operation for Bulletin use only.

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