GM Bulletin No.: 14614
Date: January 2015

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Transmission Gear Low Surface Hardness
Expires with Base Warranty

MODELS:

2014 Chevrolet Silverado and GMC Sierra
Equipped with Automatic Transmission (RPO MYC)

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 suspect transmissions on certain 2014
Chevrolet Silverado and GMC Sierra vehicles equipped with automatic transmission (RPO MYC).
These vehicles may have a transmission-durability issue due to improperly heat treated longpinion gears, which may have been manufactured below specification for surface hardness. Over
time, the gear may begin to yield and then break, which can cause gear teeth to become detached.
If this occurs, transmission noise may result, and the driver could experience reduced vehicle
mobility. A total of eight vehicles are involved.
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 on the Investigate Vehicle History screen in the Global
Warranty Management System. 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. 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.

Copyright 2015 General Motors. All Rights Reserved.

Page 2

January 2015

Bulletin No.: 14614

PART INFORMATION
Parts required to complete this service update are to be obtained from General Motors Customer
Care and Aftersales (GMCCA). 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.
Important: Since only eight vehicles are involved in this service update, dealers are strongly
encouraged not to order parts until vehicle involvement has been confirmed.
Part Number
24270747
24270749
23107857
23107858
11561618
88861037-US
19264717-CA

Description
TRANSMISSION (4CCA / 5CCA)
TRANSMISSION (4CKA / 5CKA)
RETAINER-FRT PROP SHF
RETAINER-F/AXL PROP SHF
BOLT ASM-HVY HX FLG HD W/FL W/PATCH
FLUID, A/TRANS (DEXRON 6)

Quantity/Vehicle
1
1
2 (If Needed)
2 (If Needed)
2 (If Needed)
As Needed
(Up to 1 Quart)

SERVICE PROCEDURE
1. Remove transmission from vehicle. Refer to Transmission Replacement in SI.
2. Install a new transmission. Refer to Transmission Replacement in SI.
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
9101092

Description
Transmission Replacement

Labor
Time
5.3

Net
Item
*

The amount identified in “Net Item” should represent the actual sum total of the current GMCCA
Dealer net price for the automatic transmission fluid (DEXRON 6) needed to perform the required
repairs, not to exceed $4.64 USD, $4.17 CAD, plus applicable Mark-Up.
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.

We Support
Voluntary Technician
Certification

GM CUSTOMER CARE AND AFTERSALES
DCS3496
URGENT - DISTRIBUTE IMMEDIATELY
Date:

January 13, 2015

Subject:

14614 – Service Update Bulletin
Transmission Gear Low Surface Hardness

Models:

2014 Chevrolet Silverado and GMC Sierra Equipped with
Automatic Transmission (MYC)

To:

All Chevrolet and GMC Dealers

Attention: General Manager, Service Advisor, Service Manager, Parts and
Service Director, Parts Manager, New Vehicle Sales Manager,
Used Vehicle Sales Manager, and Warranty Administrator
General Motors is releasing Service Update Bulletin 14614 today. The total
number of U.S. vehicles involved is 7. Please see the attached bulletin for
details.
Global Warranty Management (GWM)
The “Investigate Vehicle History” (IVH) screen will be updated January 14, 2015.
A list of involved vehicles is attached to this message.
END OF MESSAGE
GM CUSTOMER CARE AND AFTERSALES