Bulletin No.: 14121B
Date: May 2014

Recall Bulletin

PRODUCT SAFETY RECALL
SUBJECT:

Transmission Oil Cooler Connection

MODELS:

2014 Chevrolet Silverado Light Duty Regular Cab, Double Cab, Crew Cab
1500 Series
2015 Chevrolet Suburban, Tahoe
2014 GMC Sierra Light Duty Regular Cab, Double Cab, Crew Cab 1500
Series
2015 GMC Yukon, Yukon XL
Equipped with 6-Speed Automatic Transmission (MYC)

It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item
of motor vehicle equipment (including a tire) covered by this notification under a sale or lease
until the defect or noncompliance is remedied.
All involved vehicles that are in dealer inventory must be held and not delivered to customers,
dealer traded, or used for demonstration purposes until the repair contained in this bulletin has
been performed on the vehicle.
A copy of the customer letter has been added to the bulletin. Please discard all copies of bulletin
14121A.
CONDITION
General Motors has decided that a defect which relates to motor vehicle safety exists in 2014
MY Chevrolet Silverado Light Duty Regular Cab, Double Cab, Crew Cab 1500 Series and 2015
MY Suburban and Tahoe; GMC 2014 MY Sierra Regular Cab, Double Cab, Crew Cab 1500
Series and 2015 MY Yukon and Yukon XL vehicles equipped with a 6-Speed Automatic
Transmission (MYC). The subject vehicles may have a transmission oil cooler line that is not
securely seated in the fitting. If the line is not securely seated and transmission oil leaks from
the fitting, the oil could contact a hot surface and result in a vehicle fire.
CORRECTION
Dealers are to inspect the connection and repair it, if necessary.

Copyright 2014 General Motors. All Rights Reserved.

Page 2

May 2014

Bulletin No.: 14121B

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 recall is a violation of law in several
states/provinces/countries. Accordingly, you are urged to limit the use of this report to the followup necessary to complete this recall.
PART INFORMATION
Parts required to complete this recall are 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.
Important: It is estimated that 10 or fewer involved vehicles will require replacement of
the transmission oil cooler lines. Please order parts accordingly.
Part Number
23141324
23135704
23141325
88861037 - US
19264717 - CN

Description
PIPE, TRANS FLUID CLR INL & OTLT
(all V8 and all utility vehicles)
PIPE, TRANS FLUID CLR INL & OTLT
(V6 built on or before 7/14/13)
PIPE, TRANS FLUID CLR INL & OTLT
(V6 built on or after 7/15/13)

Quantity/Vehicle
1
(if req'd)
1
(if req'd)
1
(if req'd)

FLUID, A/TRANS(DEXRON 6)

As Needed

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May 2014

Bulletin No.: 14121B

SERVICE PROCEDURE
Notice: Ten or fewer vehicles are expected to require replacement of the transmission fluid
cooler inlet and outlet pipes.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

3792999

(1) Transmission Cooler Lines (2) Quick Connect Fittings (3) Thermal Bypass Valve

2. Inspect the transmission cooler lines where they connect to the thermal bypass valve.
2.1

Determine if the upper and lower transmission cooler lines are installed correctly by
performing a visual inspection of the transmission cooler line connections into the
thermal bypass valve.

3793000

Photograph shows a fluid leak at the quick connect fitting (2) of the transmission cooler line (1) and
thermal bypass valve (3).

2.2. Inspect the area around the thermal bypass valve (3) and the end of the transmission
cooler line (1) for evidence of a fluid leak.

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May 2014

Bulletin No.: 14121B

3793301

The transmission cooler line (1) is fully seated into the thermal bypass valve. Notice that a yellow line
is NOT present and there is no evidence of a fluid leak.

2.3

Ensure the transmission cooler lines (1) are fully seated into the thermal bypass valve
(3).

Note: The yellow band should not be visible above the top of the fitting itself. If it is visible
above the top of the fitting, then the pipe is not fully inserted and seated, refer to illustration.
2.4

Determine if a yellow mark is present at the end of the transmission cooler line at the
quick connect fitting.


If a yellow mark is not present, proceed to step 2.5.

3793000

The transmission cooler line (1) is NOT fully seated into the thermal bypass valve. Notice that a yellow
line (4) is present and there is evidence of a fluid leak.

Note: The yellow band should not be visible above the top of the fitting itself. If it is visible
above the top of the fitting, then the pipe is not fully inserted and seated, refer to illustration.


If a yellow mark (4) is present, remove and replace the transmission cooler line
with a new line. Refer to Transmission Fluid Cooler Inlet and Outlet Pipe
Replacement in SI.

Page 5
2.5

May 2014

Bulletin No.: 14121B

Using your hands, firmly pull on the ends of the transmission cooler lines to verify a
good connection between the transmission cooler lines and the thermal bypass valve,
and then perform a visual inspection to verify the connection. Pull the transmission
cooler lines toward the front of the vehicle. The transmission cooler line should NOT
pull out of the fitting.


If the upper and lower transmission cooler lines are installed correctly, no further
action is required. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in
SI.



If an upper or lower transmission cooler line is installed incorrectly, remove and
replace the transmission cooler line with a new line. Refer to Transmission Fluid
Cooler Inlet and Outlet Pipe Replacement in SI.

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.
Note: If replacement of the transmission oil cooler lines is required, submit a warranty
transaction under normal warranty, using the published time in the Labor Time
Guide
Labor
Code
9100457

Description
Inspect Transmission Cooler Lines

Labor
Time
0.3

CUSTOMER NOTIFICATION – For US and Canada
General Motors will notify customers of this recall 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.

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May 2014

Bulletin No.: 14121B

DEALER RECALL RESPONSIBILITY – For US and Export (US States, Territories,
and Possessions)
It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item
of motor vehicle equipment (including a tire) covered by this notification under a sale or lease
until the defect or noncompliance is remedied.
The US National Traffic and Motor Vehicle Safety Act provides that each vehicle that is subject
to a recall of this type must be adequately repaired within a reasonable time after the customer
has tendered it for repair. A failure to repair within sixty days after tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not adequately
repaired within a reasonable time, the customer may be entitled to an identical or reasonably
equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance
for depreciation. To avoid having to provide these burdensome remedies, every effort must be
made to promptly schedule an appointment with each customer and to repair their vehicle as
soon as possible. In the recall notification letters, customers are told how to contact the US
National Highway Traffic Safety Administration if the recall is not completed within a reasonable
time.
DEALER RECALL RESPONSIBILITY – All
All unsold new vehicles in dealers' possession and subject to this recall must be held and
inspected/repaired per the service procedure of this recall bulletin before customers take
possession of these vehicles.
Dealers are to service all vehicles subject to this recall at no charge to customers, regardless of
mileage, age of vehicle, or ownership, from this time forward.
Customers who have recently purchased vehicles sold from your vehicle inventory, and for which
there is no customer information indicated on the dealer 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. Recall follow-up cards should not be used for this purpose, since the
customer may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this recall enters your vehicle inventory, or is in your
dealership for service in the future, you must take the steps necessary to be sure the recall
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

Page 7

May 2014

Bulletin No.: 14121B
May 2014

Dear General Motors Customer:
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
General Motors has decided that a defect which relates to motor vehicle safety exists in 2014
model year Chevrolet Silverado Light Duty Regular Cab, Double Cab, Crew Cab 1500 Series
and 2015 model year Suburban and Tahoe; GMC 2014 model year Sierra Regular Cab,
Double Cab, Crew Cab 1500 Series and 2015 model year Yukon and Yukon XL vehicles
equipped with a 6-Speed Automatic Transmission. As a result, GM is conducting a safety
recall. We apologize for this inconvenience. However, we are concerned about your safety
and continued satisfaction with our products.

IMPORTANT






This notice applies to your 2014 model year Chevrolet Silverado Light
Duty Regular Cab, Double Cab, Crew Cab 1500 Series or 2015 model
year Suburban and Tahoe; GMC 2014 model year Sierra Regular Cab,
Double Cab, Crew Cab 1500 Series or 2015 model year Yukon and
Yukon XL vehicles equipped with a 6-Speed Automatic Transmission,
VIN ___________________________
Your vehicle is involved in GM safety recall 14121.
Schedule an appointment with your GM dealer.
This service will be performed for you at no charge.

Why is your
vehicle being
recalled?

Your vehicle may have a transmission oil cooler line that is not
securely seated in the fitting. If the line is not securely seated and
transmission oil leaks from the fitting, the oil could contact a hot
surface and result in a vehicle fire.

What will we
do?

Your GM dealer will inspect the connection and repair it, if
necessary. This service will be performed for you at no charge.
Because of service scheduling requirements, it is likely that your
dealer will need your vehicle longer than the actual inspection time
of approximately 20 minutes. An additional one hour may be
required if the inspection determines the transmission oil cooler lines
require replacement.

What should
you do?

You should contact your GM dealer to arrange a service
appointment as soon as possible.

Do you have
questions?

If you have questions or concerns that your dealer is unable to
resolve, please contact the appropriate Customer Assistance Center
at the number listed below.

Page 8

May 2014
Division

Number

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

1-800-222-1020
1-800-462-8782
65-6267-1752
1-800-496-9992
1-800-496-9993
1-800-496-9994

Bulletin No.: 14121B
Text Telephones
(TTY)
1-800-833-2438
1-888-889-2438

If after contacting your dealer and the Customer Assistance Center, you are still not satisfied
we have done our best to remedy this condition without charge and within a reasonable time,
you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200
New Jersey Avenue, SE., Washington, DC 20590, or call the toll-free Vehicle Safety Hotline at
1.888.327.4236 (TTY 1.800.424.9153), or go to http://www.safercar.gov. The National
Highway Traffic Safety Administration Campaign ID Number for this recall is 14V152.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a
copy of this notice to the lessee within ten days.

Jim Moloney
General Director,
Customer and Relationship Services

GM Recall #14121