GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6665
URGENT - DISTRIBUTE IMMEDIATELY
Date:

September 5, 2023

Subject: REVISION: N222375790-07 - Customer Satisfaction Program
Park Assist Retrofit
Warranty Information Table Improvements
Models: 2022 – 2023 Buick Envision
2022 – 2023 Cadillac CT4
2022 – 2023 Cadillac CT5
2022 Cadillac Escalade/Escalade ESV
2022 – 2023 Chevrolet Corvette
2022 Chevrolet Silverado 1500 New
2022 Chevrolet Suburban
2022 Chevrolet Tahoe
2022 GMC Sierra 1500 New
2022 GMC Yukon/Yukon XL
To:

All General Motors Dealers

This bulletin has been revised to improve the Warranty Information table and
to simplify the Service Procedure. Please discard all previous copies of
N222375790.
As parts become available for additional makes and models involved in this
retrofit, we will communicate the revised bulletin in an upcoming message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Customer Satisfaction Program
N222375790 Park Assist Retrofit
Release Date:
Revision Description:
Attention:

Make
Buick
Cadillac
Cadillac
Cadillac
Chevrolet
Chevrolet
Chevrolet
Chevrolet
GMC
GMC

September 2023

Revision:

07

This bulletin is being revised to improve the Warranty Information table and to simplify
the Service Procedure. Please discard all previous copies of N222375790.

This program is in effect until September 30, 2026.

Model
Envision
CT4
CT5
Escalade/Escalade ESV
Corvette
Silverado 1500 New
Suburban
Tahoe
Sierra 1500 New
Yukon/Yukon XL

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

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 and setup the serial data gateway module to restore
the Park Assist feature. Some vehicles may also need additional modules to be reprogrammed.

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

Part Name
Parking Assist Module
Parking Assist Module
Parking Assist Module
Parking Assist Module

Part No.
84761800
84761801
85131832
84987037

Note: Only 1 module needs to be ordered per vehicle. Use the VIN and the GM Electronic Parts Catalog (EPC) to
determine which Parking Assist Module to order.
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.
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.
Steps For A Successful Order on Retrofit:
1.
2.
3.
4.

Validate your VIN is open by checking Investigate Vehicle History (IVH)
Validate what part number is needed for the VIN
Verify that this part for this VIN has not been ordered previously by your dealership
Place a CSO order

Copyright 2023 General Motors. All Rights Reserved.

Page 1 of 13

Customer Satisfaction Program
N222375790 Park Assist Retrofit
5.
6.
7.
8.
9.

Upgrade to a SPAC case immediately following placing CSO
Order will be released once VIN information has been verified
One part per VIN
Use the part on the VIN it was ordered for
If an order was cancelled and you are unable to determine why, please seek assistance from your District
Manager Aftersales (DMA)

Warranty Information
Model

RPOs

Modules

Labor
Code

Labor
Time

Corvette

All Combinations

Reprogram Parking Assist Control
Module, Setup Serial Data Gateway
Module

9106526*

0.7

CT4

With UD7

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module

9106530*

1.5

CT4

With UD5
without UGN,
UVZ, or UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module

9106530*

1.5

CT4

With UD5 with
UGN, UVZ, or
UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Reprogram Image Processing
Module, Setup Serial Data Gateway
Module

9106531*

1.7

CT5

With UD7

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module

9106530*

1.4

CT5

With UD5
without UGN,
UVZ, or UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module

9106530*

1.4

CT5

With UD5 with
UGN, UVZ, or
UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Reprogram Image Processing
Module, Setup Serial Data Gateway
Module

9106531*

1.6

Tahoe/Suburban/Yukon/Yukon
XL/Escalade/Escalade ESV

Without CTT,
IOR, UVB, UGN,
UVZ, or UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module

9106530*

1.7

Tahoe/Suburban/Yukon/Yukon
XL/Escalade/Escalade ESV

With UGN, UVZ,
or UKL without
CTT, IOR, or UVB

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module, Reprogram Image Processing
Control Module

9106531*

1.9

Tahoe/Suburban/Yukon/Yukon
XL/Escalade/Escalade ESV

With CTT, IOR,
or UVB, AND
UGN, UVZ, or
UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module, Reprogram Image Processing
Control Module, Reprogram Radio

9106668*

2.1

Page 2 of 13

Customer Satisfaction Program
N222375790 Park Assist Retrofit
Tahoe/Suburban/Yukon/Yukon
XL/Escalade/Escalade ESV

With CTT, IOR,
or UVB, without
UGN, UVZ, or
UKL

Reprogram Parking Assist Control
Module, Reprogram Body Control
Module, Setup Serial Data Gateway
Module, Reprogram Radio

9106669*

1.9

Silverado/Sierra Regular Cab

Without UGN,
UVZ, or UKL

Reprogram Parking Assist Control
Module, Setup Serial Data Gateway
Module

9106526*

0.5

Silverado/Sierra
Extended/Crew Cab

Without UGN,
UVZ, or UKL

Reprogram Parking Assist Control
Module, Setup Serial Data Gateway
Module

9106526*

0.9

Silverado/Sierra Regular Cab

With UGN, UVZ,
or UKL

Reprogram Parking Assist Control
Module, Reprogram Image Processing
Control Module, Setup Serial Data
Gateway Module

9106655*

0.7

Silverado/Sierra
Extended/Crew Cab

With UGN, UVZ,
or UKL

Reprogram Parking Assist Control
Module, Reprogram Image Processing
Control Module, Setup Serial Data
Gateway Module

9106655*

1.1

Envision

All combinations

Reprogram Parking Assist Control
Module, Setup Serial Data Gateway
Module

9106526*

1.1

Important:
*All Warranty Codes are ZFAT and have NO Net Item. 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.

Page 3 of 13

Customer Satisfaction Program
N222375790 Park Assist Retrofit
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.

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.

Page 4 of 13

Customer Satisfaction Program
N222375790 Park Assist Retrofit
•

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

5644477

Page 5 of 13

Customer Satisfaction Program
N222375790 Park Assist Retrofit
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