Service Update
N192222301 Transfer Case Oil Leak
Release Date:
Attention:

August 2019

Revision:

00

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.

Make
Chevrolet
GMC

Model
Silverado 1500 (New Model)
Sierra 1500 (New Model)

Model Year
From
To
2019
2019

RPO
NP0
NQH

Description
Single Speed Transfer Case
2-Speed Transfer Case

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management
system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections
and/or repairs.
Condition

Correction

Certain 2019 model year Chevrolet Silverado 1500 (New Model) and GMC Sierra 1500 (New Model)
vehicles, equipped with a single speed transfer case (RPO NP0) or 2-speed transfer case (RPO NQH),
may have a condition in which the transfer case could leak oil if the vehicle is operated frequently with
the transfer case in Auto or 4HI. The oil leak could lead to abnormal clutch operation.
Dealers are to replace the front output shaft seal.

Parts
Note: Only select the parts that coincide with the repair performed. Caution: Choose one of the applicable part numbers
below that are required when performing the oil/fluid change. Do NOT use any other oil/fluid for this repair.
Quantity
1
1
1
1

Part Name
Transfer Case Front Output Shaft Oil Slinger
Clamp, Transfer Case Front Output Shaft Boot
Transfer Case Front Output Shaft Seal
Automatic Transmission Fluid (Dexron VI)

Part No.
84433259
84124171
84124168
88865601 (US)
19367328 (CAN)
88865754 (MEX)
88865887 (Middle East)
Obtain Locally in Compliance
with GM Spec 9986153 &
GMW1644 (all other countries)

Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts
to confirm RIM managed status. Parts may have quantity limiters in effect.
Warranty Information
Labor
Operation
9104562

Description
Front Output Shaft Seal Replacement

Labor
Time
1.5

Trans.
Type
ZFAT

Net
Item
N/A

Special Tools
DT-51329-A
J-36614

Copyright 2019 General Motors. All Rights Reserved.

Page 1 of 3

Service Update
N192222301 Transfer Case Oil Leak
Service Procedure
1.

Remove the Front Axle Propeller Shaft. Refer to Front Axle Propeller Shaft Replacement in SI.

5360261
2.

Install DT-51329-A on the transfer case front output shaft seal slinger as shown above.

5360262

3.

Using a standard 3-jaw puller, remove the slinger from the output shaft seal.
Caution: Take care not to damage the transfer case when prying the front output shaft seal out. If the transfer
case is damaged excessively during seal removal, the new seal may not seal properly after installation.

Page 2 of 3

Service Update
N192222301 Transfer Case Oil Leak

5360259

4.

Using a flat head screwdriver, pry the front output shaft seal out of the transfer case.

5.

Install the new seal in the transfer case. Using a mallet and a 3/8ths extension, carefully tap the seal in around the
outer perimeter of the seal until it is fully seated.

6.

Using J36614, drive the new slinger onto the front output shaft seal using a rubber or plastic mallet until it is seated
flush against the transfer case.

7.

Wipe the front output shaft and front output shaft seal off with a rag to clean off any metal slivers produced by driving
the slinger onto the output shaft seal.

8.

Reinstall the Front Axle Propeller Shaft. Refer to Front Axle Propeller Shaft Replacement in SI.

9.

Check the transfer case fluid level and add fluid if necessary. Refer to Transfer Case Fluid Replacement in SI.

Dealer 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.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.

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 3 of 3

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5110
URGENT - DISTRIBUTE IMMEDIATELY
Date:

August 6, 2019

Subject: N192222301 - Service Update
Transfer Case Oil Leak
Models: 2019 Chevrolet Silverado 1500 (New Model)
2019 GMC Sierra 1500 (New Model)
Equipped with Single Speed Transfer Case (RPO NP0) or 2-Speed
Transfer Case (RPO NQH)
To:

All General Motors Dealers

General Motors is releasing Service Update N192222301 today. The total
number of U.S. vehicles involved is approximately 3,243. Please see the
attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated August 7, 2019. A list of involved vehicles is attached to this message.
Please hold all warranty transactions until IVH has been updated.

END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS