GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6386
URGENT - DISTRIBUTE IMMEDIATELY
Date:

December 22, 2022

Subject: N222372590 - Service Update
Charge Air Cooler Icing
Models: 2013 – 2022 Buick Encore
2016 – 2019 Chevrolet Cruze
2018 – 2022 Chevrolet Equinox
2016 – 2021 Chevrolet Malibu
2013 – 2022 Chevrolet Trax
2018 – 2022 GMC Terrain
To:

All General Motors Dealers

General Motors is releasing Service Update N222372590 today. The total
number of U.S. vehicles involved is approximately 8,043. 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 December 22, 2022. A Stock VIN list is not included as our records show
there are no vehicles in dealer new inventory. Please hold all warranty transactions until
IVH has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Service Update
N222372590 Charge Air Cooler Icing
Release Date:
Attention:

December 2022

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

Model

Buick
Chevrolet
Chevrolet
Chevrolet
Chevrolet
GMC

Encore
Cruze
Equinox
Malibu
Trax
Terrain

Model Year
From
To
2013
2022
2016
2019
2018
2022
2016
2021
2013
2022
2018
2022

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 vehicles listed above may have a condition in which ice or sludge can accumulate in the Charge
Air Cooler (CAC) or Closed Crankcase Ventilation (CCV) system when driving in extremely cold weather
conditions (-18°C (0°F) or less).
Dealers will install a TCV thermal wrap and, if applicable, reprogram the Engine Control Module.

Parts
Quantity
1
1 (If Req)
1 (If Req)

Part Name
TCV Thermal Wrap
Turbocharger Wastegate Regulator Solenoid Valve
Turbocharger Wastegate Regulator Solenoid Valve

Part No.
25205589
55573259*
55599331*

Note: *Do NOT order for shelf stock. It is estimated that only 1% of the vehicles will require Turbocharger Wastegate
Regulator Solenoid Valve replacement. Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which
Turbocharger Wastegate Regulator Solenoid Valve to order, if required.
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
9106505*

9106506*

9106569

Description
Remove Turbocharger Wastegate Regulator Solenoid Valve, test,
apply thermal wrap, and recalibrate ECM (includes OAT relearn if
necessary)
2018+ Encore
2018+ Cruze
Equinox/Terrain
2018+ Malibu
2018+ Trax
Remove Turbocharger Wastegate Regulator Solenoid Valve, test,
apply thermal wrap, and verified ECM programming level
2018+ Encore
2018+ Cruze
Equinox/Terrain
2018+ Malibu
2018+ Trax
Remove Turbocharger Wastegate Regulator Solenoid Valve, test,
apply thermal wrap, and clear Diagnostic Trouble Codes (DTCs)
2016-2017 Encore
2016-2017 Cruze
2016-2017 Malibu
2013-2017 Trax

Copyright 2022 General Motors. All Rights Reserved.

Labor
Time

Trans.
Type

Net
Item

ZFAT

N/A

1.3
0.7
1.0
0.8
1.3

0.9
0.5
0.8
0.4
0.9

0.9
0.5
0.4
0.9
Page 1 of 7

Service Update
N222372590 Charge Air Cooler Icing
Important: * To avoid warranty transaction rejections, carefully read and follow the instructions below:

6125814

•
•

The Warranty Claim Code from the programming event must be accurately entered in the “Warranty Claim
Code” field of the transaction.
When more than one Warranty Claim Code is generated for a programming event, it is required to document all
Warranty Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the
“Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter
the FINAL code provided by SPS2.

Warranty Claim Code Information Retrieval

6125774

If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as
follows:
1.
2.
3.
4.

Open TLC on the computer used to program the vehicle.
Select and start SPS2.
Select Settings (1).
Select the Warranty Claim Code tab (2).

The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is
retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code
field.

Page 2 of 7

Service Update
N222372590 Charge Air Cooler Icing
Service Procedure
Note: All vehicles model year 2018 and newer require BOTH the thermal wrap and ECM reprogramming.

4823346

1.

Remove the turbocharger wastegate regulator solenoid valve (TCV) (2). Refer to Turbocharger Wastegate Regulator
Solenoid Valve Replacement in SI.

2.

Drain the TCV by turning the valve upside down.

6055068

Note: Check port #2 to assure the spring gets lifted off the seat. This will be determined by the compressed air not dead
heading when applied to port #2. When applying air to this port, a small amount of air should be observed at port #3 and
even less air will be noticed at port #1. If this does not happen, the TCV plunger may have hardened deposits from hot
operating conditions which will impede TCV plunger movement, and the TCV should be replaced.
3.

Using clean shop air regulated to 80-100 PSI, blow through all three ports (1, 2 & 3) for 5 seconds each.
•

Repeat step 3 twice.

Page 3 of 7

Service Update
N222372590 Charge Air Cooler Icing

6055077

4.

Prior to reinstalling the TCV, pre-position the thermal wrap. This will aid in installation of the wrap once the TCV is
reinstalled.

6046314

Note: The end result of the wrap will surround the TCV as shown in the graphic above.
5.

Install the TCV. Refer to Turbocharger Wastegate Regulator Solenoid Valve Replacement in SI.

Page 4 of 7

Service Update
N222372590 Charge Air Cooler Icing

6046334

6.

Once the mounting bolt and hoses are properly installed, pull the lower portion of the wrap upward and snap it into
position.

7.

For Chevrolet Equinox and GMC Terrain, and all other vehicles model year 2018 and newer, proceed to the next step
for programming.
•

For all other vehicles of earlier than model year 2018, it is NOT necessary to program the ECM. Simply hook
up the MDI or MDI2 and clear all DTCs from the vehicle.

Note: Carefully read and follow the instructions below.

•

Ensure the programming tool is equipped with the latest software and is securely connected to the data link
connector. If there is an interruption during programming, programming failure or control module damage may
occur.

•

Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will
interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to
www.gmdesolutions.com for further information. If not available, connect a fully charged 12 V jumper or booster
pack disconnected from the AC voltage supply. DO NOT connect a battery charger.

•

Follow the on-screen prompts regarding ignition power mode, but ensure that anything that drains excessive
power (exterior lights, HVAC blower motor, etc) is off.

•

Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M)
system status indicators to NO.

Important: The service technician always needs to verify that the VIN displayed in the TLC left side drop down menu and
the top center window match the VIN plate of the vehicle to be programmed prior to using Service Programming System
2 (SPS2) for programming or reprogramming a module.

•

For the TLC application, service technicians need to always ensure that the power mode (ignition) is “ON” before
reading the VIN from the vehicle’s VIN master module and that they do not select a VIN that is already in the
TLC application memory from a previous vehicle.

•

If the VIN that shows up in the TLC top center window after correctly reading the VIN from the vehicle does not
match the VIN plate of the vehicle, manually type in the VIN characters from the vehicle VIN plate into the TLC
top center window and use these for programming or reprogramming the subject module with the correct vehicle
VIN and software and/or calibrations.

•

The Engine Control Module (ECM) is the master module (for VIP vehicles) that TLC reads to determine the VIN
of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the ECM also
needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate.

Page 5 of 7

Service Update
N222372590 Charge Air Cooler Icing
•

The Body Control Module (BCM) is the master module (for GEM vehicles) that TLC reads to determine the VIN
of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the BCM also
needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate.

Caution: Be sure the VIN selected in the drop down menu (1) is the same as the vehicle connected (2) before beginning
programming.

5743643

Important: If the vehicle VIN DOES NOT match, the message below will be shown.

5877000

5644477

Important: Techline Connect screens shown above.
Important: If the same calibration/software warning is noted on the TLC Summary screen, select OK and follow
screen instructions. After a successful programming event, the WCC is located in the Service Programming System
dialogue box of the SPS Summary screen. No further action is required. Refer to the Warranty section of the bulletin.
8.

Reprogram the Engine Control Module (ECM) refer to K20 Engine Control Module: Programming and Setup in SI.
Page 6 of 7

Service Update
N222372590 Charge Air Cooler Icing

5644478

Note: The screenshot above is an example of module programming and may not be indicative of the specific module that
is being programmed. Module selection and VIN information have been blacked out.
Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the Warranty
Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the
screen.
9.

Record SPS Warranty Claim Code on job card for warranty transaction submission.

10. Clear any DTCs present in the vehicle.
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

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