Service Update
N222384940 Air Compressor Port Mis-Build
Release Date:
Attention:

August 2023

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.
ONLY Chevrolet Medium Duty dealers can complete this field action repair.

Make
Chevrolet

Model
Silverado 4500HD/5500HD/6500HD

Model Year
From
To
2022 2022

RPO
KUT

Description
AIR COMPRESSORACCESSORY DRIVE

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

On certain 2022 model year Chevrolet Silverado 4500HD/5500HD/6500HD vehicles, the air compressor
coolant outlet port may cause a slow coolant leak at the air compressor on the engine.
Dealers are to inspect, and if necessary, replace the automatic level control air compressor.

Parts
Quantity
1
*
As
Required

Part Name
Automatic Level Control Air Compressor
Air Compressor Drive Belt
Engine Coolant

Part No.
19409042
12689254
12346290

*Only to be replaced if inspection determines replacement is necessary during replacement of the air compressor.
It is estimated that only 213 involved vehicles will require parts 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.
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
9106948
9106949

Description
Inspect Only – No Further Action Required
Automatic Level Control Air Compressor Inspection and Replacement

Labor
Time
0.3
2.6

Trans.
Type
ZFAT
ZFAT

Net
Item
N/A
N/A

Service Procedure

6405853
Copyright 2023 General Motors. All Rights Reserved.

Page 1 of 2

Service Update
N222384940 Air Compressor Port Mis-Build
1.

2.

Inspect the Automatic Level Control Air Compressor to see if the Coolant Outlet Port has a leak as shown.
•

If the Coolant Outlet Port is not leaking, no further action is required.

•

If the Coolant Outlet Port is leaking, proceed to step 2.

Replace the Automatic Level Control Air Compressor. Refer to Automatic Level Control Air Compressor
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.
Dealer Reports – For USA & Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.

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

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6657
URGENT - DISTRIBUTE IMMEDIATELY
Date:

August 24, 2023

Subject: N222384940 - Service Update
Air Compressor Port Mis-Build
Models: 2022 Chevrolet Silverado 4500HD/5500HD/6500HD
Equipped with AIR COMPRESSOR-ACCESSORY DRIVE (RPO KUT)
To:

All General Motors Medium Duty Dealers

General Motors is releasing Service Update N222384940 today. The total
number of U.S. vehicles involved is 213. 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 24, 2023. A list of vehicles in dealer inventory is attached to this
message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS