N192219160

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5090
URGENT - DISTRIBUTE IMMEDIATELY
Date:
July 18, 2019
Subject: N192219160 - Service Update
Rear Axle Housing Breather Not Properly Installed
Models: 2019 Chevrolet Silverado 4500/5500/6500
To:
All General Motors Dealers
General Motors is releasing Service Update N192219160 today. The total
number of U.S. vehicles involved is approximately 202. 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 July 19, 2019. A list of involved vehicles in dealer new inventory is attached
to this message. Please hold all warranty transactions until IVH has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
Service Update
N192219160 – Rear Axle Housing Breather Not Properly Installed
Release Date:
Attention:
July 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
Model
Silverado 4500/5500/6500
Model Year
From
To
2019
2019
RPO
Description
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 Chevrolet Silverado 4500/5500/6500 vehicles may have been built with a rear axle housing
breather improperly installed. If the rear axle housing breather were loose or missing, a customer could
see rear diff. fluid on the ground. If the leak were ignored, a grinding noise could occur and continued
use of the vehicle may result in the rear differential seizing.
Verify rear axle housing breather is installed/oriented correctly. If not, drain and refill rear differential to
eliminate any possible contamination and install new rear axle housing breather.
Parts
Quantity
1
1
Part Name
Part No.
19404922
88900401
Rear Axle Housing Breather Kit
75w90 Synthetic Lubricant
It is estimated that there are only 202 involved vehicles that will require parts being replaced. Due to the small number
of vehicles anticipated that will need this fix and the limited initial parts availability, dealers are encouraged not
to order these parts for use as shelf stock.
Note: Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which rear axle housing breather kit to order.
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.
IMPORTANT: The gear lubricant, part 88900401, must be purchased in a quantity of 12 and may already be available in
your dealer inventory.
Warranty Information
Labor
Operation
9104547
9104548
Description
Inspect Only – No Further Action Required
Rear Axle Housing Breather Installation and Drain and Fill Rear
Differential Fluid
Copyright 2019 General Motors. All Rights Reserved.
Labor
Time
0.2
Trans.
Type
ZFAT
Net
Item
N/A
0.5
ZFAT
N/A
Page 1 of 2
Service Update
N192219160 – Rear Axle Housing Breather Not Properly Installed
Service Procedure
5359983
1.
Inspect the Rear Axle Housing Breather (as shown above) to see if it is present.
•
If the Rear Axle Housing Breather is present, no further action is required.
•
If the Rear Axle Housing Breather is not present, proceed to step 2.
2.
Install a Rear Axle Housing Breather. Refer to Rear Axle Housing Breather Replacement in SI.
3.
Drain and fill the differential fluid. Refer to Differential Oil 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 2 of 2