Bulletin No.: 13384
Date: November 2013

Program Bulletin

CUSTOMER SATISFACTION PROGRAM
SUBJECT:

Low Rear Differential Fluid Level

MODELS:

2014 Chevrolet Corvette

THIS PROGRAM IS IN EFFECT UNTIL NOVEMBER 30, 2015.
CONDITION
The rear differential assembly in certain 2014 model year Chevrolet Corvette vehicles may
have been shipped from the supplier with insufficient fluid. Operating the vehicle without
sufficient fluid in the rear differential assembly could produce a loud whine and/or gear or
bearing noise.
CORRECTION
Dealers are to inspect the rear differential fluid level and add fluid, if necessary. If fluid is
required, dealers are to also road-test the vehicle and listen for rear axle noise. If a whine, gear
or bearing noise is present, dealers are to replace the rear differential assembly.
VEHICLES INVOLVED
All involved vehicles are identified by Vehicle Identification Number on the Investigate Vehicle
History screen in GM Global Warranty Management system. Dealership service personnel
should always check this site to confirm vehicle involvement prior to beginning any required
inspections and/or repairs. It is important to routinely use this tool to verify eligibility because
not all similar vehicles may be involved regardless of description or option content.
For dealers with involved vehicles, a listing with involved vehicles containing the complete
vehicle identification number, customer name, and address information has been prepared and
will be provided to US and Canadian dealers through the GM GlobalConnect Recall Reports, or
sent directly to export dealers. Dealers will not have a report available if they have no involved
vehicles currently assigned.
The listing may contain customer names and addresses obtained from Motor Vehicle
Registration Records. The use of such motor vehicle registration data for any purpose other
than follow-up necessary to complete this program is a violation of law in several
Copyright 2013 General Motors. All Rights Reserved.

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November 2013

Bulletin No.: 13384

states/provinces/countries. Accordingly, you are urged to limit the use of this report to the
follow-up necessary to complete this program.
PART INFORMATION
Differential fluid, if required, is to be obtained from General Motors Customer Care and
Aftersales (GMCC&A). Please refer to your “involved vehicles listing” before ordering parts.
Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency
situation, parts should be ordered on a CSO = Customer Special Order.
In the rare event that a rear differential requires replacement, orders will be processed through
the PQC with a PQC case prior to release by calling 866-654-7654. Please reference PIP 5142
for exchange program instructions.
Part Number
88862624 – US
88862625 - CN

Description
LUBRICANT, DIFFERENTIAL

Quantity/Vehicle
Up to 3 quarts/litres
(Submit as Net Item)

SERVICE PROCEDURE
1. Raise and support vehicle. Refer to Lifting and Jacking the Vehicle in SI.

3404597

2. Check the rear axle fluid level. Refer to Rear Axle Lubricant Level Inspection in SI.


If adding rear axle fluid is NOT required, no further action is required. Lower the vehicle.
Refer to Lifting and Jacking the Vehicle in SI.



If adding rear axle fluid is required, add the recommended amount of fluid to the rear
axle. Proceed to step 3.

3. Take the vehicle on a 10 minute road test to determine if there is a whine, gear or bearing
noise.


If rear axle noise is NOT present, no further action is required.



If rear axle noise is present, contact the PQC for additional instructions.

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November 2013

Bulletin No.: 13384

COURTESY TRANSPORTATION – For US and Canada
The General Motors Courtesy Transportation program is intended to minimize customer
inconvenience when a vehicle requires a repair that is covered by the New Vehicle Limited
Warranties. The availability of courtesy transportation to customers whose vehicles are within
the warranty coverage period and involved in a product program is very important in maintaining
customer satisfaction. Dealers are to ensure that these customers understand that shuttle
service or some other form of courtesy transportation is available and will be provided at no
charge. Dealers should refer to the General Motors Service Policies and Procedures Manual for
Courtesy Transportation guidelines.
WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Labor
Code
9100238
9100239*

Description
Inspect Rear Differential Fluid Level – No Further Action Req'd
Inspect & Add Differential Fluid & Road Test Vehicle

Labor
Time
0.3
0.7

Net
Item
N/A
**

* If the rear differential requires replacement, submit for the inspection, fluid add, and road test
under this bulletin using labor code 9100239. Use normal warranty labor code and labor
operation time for the replacement of the rear differential.
** Submit the cost of the actual amount of differential fluid used to perform the required repairs,
not to exceed $38.40 USD, $39.49 CAD, plus applicable Mark-Up.
CUSTOMER NOTIFICATION – For US and Canada
General Motors will notify customers of this program on their vehicle (see copy of customer
letter included with this bulletin).
CUSTOMER NOTIFICATION – For Export
Letters will be sent to known owners of record located within areas covered by the US National
Traffic and Motor Vehicle Safety Act. For owners outside these areas, dealers should notify
customers using the attached sample letter.
DEALER PROGRAM RESPONSIBILITY
All unsold new vehicles in dealers' possession and subject to this program must be held and
inspected/repaired per the service procedure of this program bulletin before customers take
possession of these vehicles.
Dealers are to service all vehicles subject to this program at no charge to customers, regardless
of mileage, age of vehicle, or ownership, through November 30, 2015.
Customers who have recently purchased vehicles sold from your vehicle inventory, and for
which there is no customer information indicated on the involved vehicle listing, are to be
contacted by the dealer. Arrangements are to be made to make the required correction
according to the instructions contained in this bulletin. A copy of the customer letter is provided
in this bulletin for your use in contacting customers. Program follow-up cards should not be
used for this purpose, since the customer may not as yet have received the notification letter.

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November 2013

Bulletin No.: 13384

In summary, whenever a vehicle subject to this program enters your vehicle inventory, or is in
your facility for service through November 30, 2015, you must take the steps necessary to be
sure the program correction has been made before selling or releasing the vehicle.

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 tools,
equipment, 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 dealer for information on whether your vehicle may benefit from the information.

We Support
Voluntary Technician
Certification

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November 2013

Bulletin No.: 13384
November 2013

Dear General Motors Customer:
We have learned that the rear differential assembly in your 2014 model year Chevrolet Corvette
may have been shipped from the supplier with insufficient fluid. Operating the vehicle without
sufficient fluid in the rear differential assembly could produce a loud whine and/or gear or
bearing noise.
Your satisfaction with your Chevrolet Corvette is very important to us, so we are announcing a
program to address this condition.
What We Will Do: Your GM dealer will inspect the rear differential fluid level and add fluid, if
necessary. If fluid is required, your dealer will also road-test the vehicle to listen for rear axle
noise. If a whine, gear or bearing noise is present, your dealer will replace the rear differential
assembly. This service will be performed for you at no charge until November 30, 2015. After
that, any applicable warranty will apply.
What You Should Do: To limit any possible inconvenience, we recommend that you contact
your dealer as soon as possible to schedule an appointment for this repair.
If you have any questions or concerns that your dealer is unable to resolve, please contact the
appropriate Customer Assistance Center at the number listed below.
Division

Number

Chevrolet
Guam
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

1-800-222-1020
65-6267-1752
1-800-496-9992
1-800-496-9993
1-800-496-9994

Text Telephones
(TTY)
1-800-833-2438

Courtesy Transportation: If your vehicle is within the New Vehicle Limited Warranty, your
dealer may provide you with shuttle service or some other form of courtesy transportation while
your vehicle is at the dealership for this repair. Please refer to your Owner Manual and your
dealer for details on Courtesy Transportation.
We sincerely regret any inconvenience or concern that this situation may cause you. We want
you to know that we will do our best, throughout your ownership experience, to ensure that your
Chevrolet Corvette provides you many miles of enjoyable driving.
Jim Moloney
General Director,
Customer and Relationship Services
13384

GM CUSTOMER CARE AND AFTERSALES
DCS3092
URGENT - DISTRIBUTE IMMEDIATELY
Date:

November 7, 2013

Subject:

13384 - Customer Satisfaction Program
Low Rear Differential Fluid Level

Models:

2014 Chevrolet Corvette

To:

All Chevrolet Dealers

Attention: General Manager, Service Advisor, Service Manager, Parts and
Service Director, Parts Manager, New Vehicle Sales Manager,
and Warranty Administrator
General Motors is announcing Customer Satisfaction Program 13384 today.
The total number of U.S. vehicles involved is 2,265. Please see the attached
bulletin for details.
Customer Letter Mailing
The customer letter mailing will begin November 25, 2013.
Global Connect (GWM)
The “Investigate Vehicle History” (IVH) screen will be updated November 12, 2013. A
list of involved vehicles is attached to this message. Please hold all warranty
transactions until the VINs appear in IVH.
Campaign Initiation Detail Report (CIDR)
The CIDR will be available November 18, 2013.
END OF MESSAGE
GM CUSTOMER CARE AND AFTERSALES