GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6598
URGENT - DISTRIBUTE IMMEDIATELY
Date:

June 5, 2023

Subject: N222375791-04 - Customer Satisfaction Program
Park Assist Retrofit
Population Update
Models: 2022 – 2023 Buick Enclave
2022 – 2023 Cadillac XT4
2022 – 2023 Cadillac XT5
2022 – 2023 Cadillac XT6
2022 Chevrolet Blazer
2022 – 2023 Chevrolet Camaro
2022 Chevrolet Silverado 1500 LTD
2022 – 2023 Chevrolet Silverado 2500HD/3500HD
2022 - 2023 GMC Acadia
2022 GMC Sierra 1500 Limited
2022 – 2023 GMC Sierra 2500HD/3500HD
To:

All General Motors Dealers

This bulletin has been revised to add additional 2022 Chevrolet Silverado and
GMC Sierra vehicles to the population. Please discard all previous copies of
N222375791.
As parts become available for additional makes and models involved in this
retrofit, we will communicate the revised bulletin in an upcoming message.
PART ORDERING INFORMATION
Due to limited initial parts availability, dealers should not order parts included
in this field action for use as shelf stock. Parts should only be ordered when
the dealer has confirmed and validated the customer has a scheduled
appointment with the service department.
Dealers will need to place orders CSO (Customer Service Order) and upgrade
to a SPAC, all CSO without a SPAC will be cancelled daily. All orders will
require a unique VIN for each order. If a VIN is not provided with the order, or
has already been used, those orders will be cancelled. This change in process
is due to limited parts availability and to assure we have ample stock for
customers requiring the retrofit.
The Park Assist Retrofit will be executed under 2 separate bulletins:
• N222375790 will cover Vehicle Intelligence Platform (VIP) Electrical
Architecture
• N222375791 will cover Global A Electrical Architecture

Customer Letter Mailing
The customer letter mailing for this phase will begin in June 2023.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated June 5, 2023. A Stock VIN list is not included as our records show there
are no vehicles in dealer new inventory.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Customer Satisfaction Program
N222375791 Park Assist Retrofit
Release Date:
Revision Description:
Attention:

Make
Buick
Cadillac
Cadillac
Cadillac
Chevrolet
Chevrolet
Chevrolet
Chevrolet
GMC
GMC
GMC

June 2023

Revision:

04

This bulletin is being revised to update the service procedure to include additional
models. Please discard all previous copies of N222375791.

This program is in effect until June 30, 2026.

Model
Enclave
XT4
XT5
XT6
Blazer
Camaro
Silverado 1500 LTD
Silverado 2500HD/3500HD
Acadia
Sierra 1500 Limited
Sierra 2500HD/3500HD

Model Year
From
To
2022
2023
2022
2023
2022
2023
2022
2023
2022
2022
2022
2023
2022
2022
2022
2023
2022
2023
2022
2022
2022
2023

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

Due to the industry-wide semiconductor shortage, the park assist feature is not functional on certain 2022
and 2023 model year vehicles listed above, built beginning December 2, 2021. The affected vehicle
owners should have been made aware of the condition at sale, and notified, that once parts are available,
they would be eligible for a no additional cost retrofit to enable the feature.
Dealers are to replace the park assist control module to restore the Park Assist feature. Note: some
vehicles may also require reprogramming of the instrument cluster or the active safety control module.

Parts – MUST BE ORDERED BY SPAC, PLEASE SEE NOTES BELOW
Quantity
1
1
1
2*
1**
1+
1***

Part Name
Parking Assist Module
Parking Assist Module
Parking Assist Module
Nut
Fastener
Nut
Thread Locking Adhesive

Part No.
84421595
39156865
84716060
11546449
01605396
11516836
19333511 (US) 10953489 (CA)
Obtain locally in compliance w/
GM spec GMW14657

Note: Only 1 module needs to be ordered per vehicle. Use the VIN and the GM Electronic Parts Catalog (EPC) to
determine which parts to order.
*XT4 only uses 1 nut. No nuts are required for Camaro.
**XT4 only.
***Enclave only, one tube services 10 vehicles.
Do NOT place orders until the customer contacts the dealership to schedule an appointment.
Parts required to complete this recall are to be obtained from General Motors Customer Care and Aftersales (GMCCA).
Please refer to your “involved vehicles listing” before ordering parts. Parts for this Retrofit will be on Order Writing control
initially and all DRO’s (Daily Replenishment Orders) may cancel. Dealers should place orders CSO (Customer Special
Order) and upgrade to SPAC with a VIN. All orders will be reviewed prior to being filled. All CSO may be cancelled
daily. Only SPAC orders with a valid VIN associated with the vehicle listing will be released while on the order
writing control. Due to order writing control orders will not ship as OVN. Please take this into consideration in
shipping if not coming from your Admin PDC.

Copyright 2023 General Motors. All Rights Reserved.

Page 1 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
Reminder: Parts will be removed from SPRINT, they are non-returnable and 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.
For Dealers Location Outside of US/Canada, please order from your regional service part facility.
Warranty Information
Labor
Operation

Description
Install Parking Assist Module and Program Parking Assist Module,
and Instrument Cluster:
Camaro
XT6
9106540*
XT5
XT4** or XT4***
Acadia+
Enclave++
Blazer +++++
Install Parking Assist Module and Program Parking Assist Module,
Instrument Cluster, and Active Safety Control Module:
XT4****
9106630*
Acadia+++
Enclave++++
Blazer++++++
Install Parking Assist Module and Program Parking Assist Module,
Instrument Cluster, and Body Control Module
9106640*
Silverado/Sierra Regular Cab
Silverado/Sierra Double Cab/Crew Cab
** If vehicle is a XT4 with UD7, see XT4 with UD7.

Labor
Time

Trans.
Type

Net
Item

ZFAT

N/A

0.8
0.8
1.6
1.2
1.6
2.6
1.4

1.4
1.8
2.8
1.6

1.1
1.3

***If vehicle is a XT4 with UD5 without UGN, UVZ, or UKL, see XT4 with UD5 without UGN, UVZ, or UKL.
****If vehicle is a XT4 with UD5 with UGN, UVZ, or UKL, see XT4 with UD5 with UGN, UVZ, or UKL.
+If vehicle is an Acadia without UGN, UVZ, or UKL, see Acadia without UGN, UVZ, or UKL.
++If vehicle is an Enclave without UGN, UVZ, or UKL, see Enclave without UGN, UVZ, or UKL.
+++If vehicle is an Acadia with UGN, UVZ, or UKL, see Acadia with UGN, UVZ, or UKL.
++++If vehicle is an Enclave with UGN, UVZ, or UKL, see Enclave with UGN, UVZ, or UKL.
+++++If vehicle is a Blazer without UGN, UVZ, or UKL, see Blazer without UGN, UVZ, or UKL.
++++++If vehicle is a Blazer with UGN, UVZ, or UKL, see Blazer with UGN, UVZ, or UKL.

Important:

* To avoid warranty transaction rejections, carefully read and follow the instructions below:

6125814

Page 2 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
• 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.
Service Procedure
Caution: Before downloading the update files, be sure the computer is connected to the internet through a network cable
(hardwired). DO NOT DOWNLOAD or install the files wirelessly. If there is an interruption during programming,
programming failure or control module damage may occur.
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.

Page 3 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
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.

•

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

Page 4 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit

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.
Caution: It is vitally important that the procedure is completed by a properly trained technician and that the proper
steps are followed for the vehicle make, model, and RPO combination. The parking assist system will not function
properly if the proper procedure is not followed.
1.

Determine vehicle and RPO package.
• If vehicle is a Camaro, see Camaro.
• If vehicle is a XT6, see XT6.
• If vehicle is a XT5, see XT5.
• If vehicle is a XT4 with UD7, see XT4 with UD7.
• If vehicle is a XT4 with UD5 without UGN, UVZ, or UKL, see XT4 with UD5 without UGN, UVZ, or UKL.
• If vehicle is a XT4 with UD5 with UGN, UVZ, or UKL, see XT4 with UD5 with UGN, UVZ, or UKL.
• If vehicle is a Silverado/Sierra, see Silverado/Sierra (includes both 2022 and 2023 LDs and HDs).
• If vehicle is an Enclave with UGN, UVZ, or UKL, see Enclave with UGN, UVZ, or UKL
• If vehicle is an Enclave without UGN, UVZ, or UKL, see Enclave without UGN, UVZ, or UKL
• If vehicle is an Acadia with UGN, UVZ, or UKL, see Acadia with UGN, UVZ, or UKL
• If vehicle is an Acadia without UGN, UVZ, or UKL, see Acadia without UGN, UVZ, or UKL
• If vehicle is a Blazer with UGN, UVZ, or UKL, see Blazer with UGN, UVZ, or UKL
• If vehicle is a Blazer without UGN, UVZ, or UKL, see Blazer without UGN, UVZ, or UKL

Page 5 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
Camaro

6288463

Note: The wiring harness for the Parking Assist Control Module may be wrapped around an adjacent wiring harness as
shown above. Remove the attaching tape by unwrapping. Do NOT cut the tape as it could damage the wiring
harness.
1.

Install the new Parking Assist Control Module. Refer to Parking Assist Control Module Replacement in SI.

Caution: When starting SPS2, select Reprogram NOT Replace and Reprogram.
2.

Reprogram the Parking Assist Control Module. Refer to K182 Parking Assist Control Module: Programming and
Setup in SI.

3.

Perform setup and configuration on the Parking Assist Control Module. Refer to K182 Parking Assist Control Module:
Programming and Setup in SI.
Note: This programming event is for “Setup and Configuration” only.

4.

Perform setup and configuration on the Instrument Cluster. Refer to P16 Instrument Cluster: Programming and Setup
in SI.

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.

Page 6 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
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.
5.

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

6.

Clear all DTCs.
Note: Depending upon vehicle RPO, it may be equipped with both front and rear parking assist or just rear park
assist.

7.

Verify parking assist is now active on vehicle.

XT6

6288463

Note: The wiring harness for the Parking Assist Control Module may be wrapped around an adjacent wiring harness as
shown above. Remove the attaching tape by unwrapping. Do NOT cut the tape as it could damage the wiring
harness.
1.

Install the new Parking Assist Control Module. Refer to Parking Assist Control Module Replacement in SI.

Caution: When starting SPS2, select Reprogram NOT Replace and Reprogram.
2.

Reprogram the Parking Assist Control Module. Refer to K182 Parking Assist Control Module: Programming and
Setup in SI.

3.

Perform setup and configuration on the Parking Assist Control Module. Refer to K182 Parking Assist Control Module:
Programming and Setup in SI.
Note: This programming event is for “Setup and Configuration” only.

4.

Perform setup and configuration on the Instrument Cluster. Refer to P16 Instrument Cluster: Programming and Setup
in SI.

Page 7 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit

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.
5.

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

6.

Clear all DTCs.
Note: Depending upon vehicle RPO, it may be equipped with both front and rear parking assist or just rear park
assist.

7.

Verify parking assist is now active on vehicle.

XT5

6288463

Note: The wiring harness for the Parking Assist Control Module may be wrapped around an adjacent wiring harness as
shown above. Remove the attaching tape by unwrapping. Do NOT cut the tape as it could damage the wiring
harness.
1.

Install the new Parking Assist Control Module. Refer to Parking Assist Control Module Replacement in SI.

Caution: When starting SPS2, select Reprogram NOT Replace and Reprogram.

Page 8 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
2.

Reprogram the Parking Assist Control Module. Refer to K182 Parking Assist Control Module: Programming and
Setup in SI.

3.

Perform setup and configuration on the Parking Assist Control Module. Refer to K182 Parking Assist Control
Module: Programming and Setup in SI.
Note: This programming event is for “Setup and Configuration” only.

4.

Perform setup and configuration on the Instrument Cluster. Refer to P16 Instrument Cluster: Programming and
Setup.

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.
5.

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

6.

Clear all DTCs.

Note: Depending upon vehicle RPO, it may be equipped with both front and rear parking assist or just rear park assist.
7.

Verify parking assist is now active on vehicle.

Page 9 of 23

Customer Satisfaction Program
N222375791 Park Assist Retrofit
XT4 with UD7

6288463

Note: The wiring harness for the Parking Assist Control Module may be wrapped around an adjacent wiring harness as
shown above. Remove the attaching tape by unwrapping. Do NOT cut the tape as it could damage the wiring
harness.
1.

Install the new Parking Assist Control Module. Refer to Parking Assist Control Module Replacement in SI.

Caution: When starting SPS2, select Reprogram NOT Replace and Reprogram.
2.

Reprogram the Parking Assist Control Module. Refer to K182 Parking Assist Control Module: Programming and
Setup in SI.

3.

Perform setup and configuration on the Parking Assist Control Module. Refer to K182 Parking Assist Control
Module: Programming and Setup in SI.

Note: This programming event is for “Setup and Configuration” only.
4.

Perform setup and configuration on the Instrument Cluster. Refer to P16 Instrument Cluster: Programming and
Setup.

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