GM Bulletin No.: 12316
Date: December 2012

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Improper Differential Ring Gear Weld
Expires with Base Warranty

MODELS:

2013 Cadillac ATS
Rear Wheel Drive

Vehicles involved in this Service Update were placed on Stop Delivery November 29,
2012. Once the service procedure contained in this bulletin has been performed on the
vehicle, the vehicle will be released from the Stop Delivery.
This service update includes vehicles in dealer inventory and customer vehicles that
return to the dealership for any reason. This bulletin will expire at the end of the involved
vehicle's New Vehicle Limited Warranty period.
PURPOSE
This bulletin provides a service procedure to replace the differential carrier assembly on certain
2013 model year Cadillac rear wheel drive ATS vehicles. The weld between the ring gear and
carrier may not be to specification and could allow the ring gear to separate. If this occurs, the
driver can apply throttle but the vehicle will not move. If this occurs while the vehicle is in
motion, the vehicle will coast to a stop.
This service procedure should be completed as soon as possible on involved vehicles
currently in dealer inventory and customer vehicles that return to the dealer for any type
of service during the New Vehicle Limited Warranty coverage period.
VEHICLES INVOLVED
All involved vehicles are identified by VIN in the Global Warranty Management System –
Investigate Vehicle History Application. Dealership technicians 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.
Additionally, a list of involved vehicles currently in dealer inventory is available on the “Service
Update Bulletin Information” link under the “Service” tab in GM GlobalConnect (US) or attached
Copyright 2012 General Motors. All Rights Reserved.

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December 2012

Bulletin No.: 12316

to the GlobalConnect message (Canada) used to release this bulletin. Customer vehicles that
return for service, for any reason, and are still covered under the vehicle's base warranty should
also be checked for vehicle eligibility.
PART INFORMATION
Differential carrier assemblies are to be obtained by sending an email to American Axle &
Manufacturing (AAM) at [email protected]. Axles will be shipped to dealers at nocharge. The following is to be included in the email:


Dealership Name



Shipping Address



Contact Person



Contact Email Address



Contact Telephone Number



Full 17-character vehicle identification number (VIN)

Note: All differential carrier assemblies are to be returned to the Warranty Parts Center.
Please hold all assemblies until you receive the Warranty Parts Return Request form.
SERVICE PROCEDURE
1. Remove the differential carrier assembly. Refer to Differential Carrier Assembly
Replacement in SI.
Note: The differential carrier assembly is shipped with fluid. Please verify that the differential
carrier assembly has been filled with fluid BEFORE installing the assembly. No gaskets are
required for this repair.
2. Install a new differential carrier assembly. Refer to Differential Carrier Assembly
Replacement in SI. Refer to Parts Information in this bulletin to obtain a new differential
carrier assembly.
3. Perform a road test to ensure there is no carrier assembly noise or drivetrain vibration.

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December 2012

Bulletin No.: 12316

WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below.
Labor
Code
V2722
V2723

Labor
Time
2.5
N/A

Description
Replace Differential Carrier Assembly
Floor Plan Reimbursement

Net
Item
*
**

*

Differential carrier assemblies are being provided to dealers at no-charge. Dealers are to
submit for only the applicable Mark-Up on the assembly, P/N 22927262.

**

The amount identified in “Net Item” should represent the product of the vehicle’s average
daily interest rate (see table below) multiplied by the actual number of days the vehicle was
in dealer inventory and not available for sale. This reimbursement is limited to the number
of days from the date of the stop delivery message (November 29, 2012) to the date the
repair is completed and the vehicle is ready for sale (not to exceed 20 days):
US
Reimbursement Amount

Canadian
Reimbursement Amount

$5.67

$5.45

DEALER PROGRAM RESPONSIBILITY
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your
facility for service in the future, and the vehicle is still covered under the New Vehicle Limited
Warranty, you must take the steps necessary to be sure the service update 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.

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