Service Update
N202296490 Drive Motor Power Inverter Module
Release Date:
Attention:

June 2020

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
Cadillac

Model
CT6

Model Year
From
To
2017
2018

RPO
HP9

Description
Hybrid Propulsion – Plug-In
Identifier

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 2017 and 2018 model year Cadillac CT6 vehicles equipped with the hybrid propulsion – plug-in
identifier (RPO HP9) may experience certain circumstances where the engine may not start as planned
and the vehicle will run only on battery power. DTC P0AB9 may also set.
Dealers are to reprogram the drive motor power inverter module.

Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9104862*

9104863*

Description
Verified Module Software or Calibration Level: Module Is
Programmed with Same Level Software or Calibration
Add: Diagnosis
Drive Power Inverter Module (PIM) Reprogramming with SPS
Add: Diagnosis

Labor
Time
0.2

Trans.
Type

Net
Item

0.1 – 0.5
0.4
0.1 – 0.5

ZFAT

N/A

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

The SPS Warranty Claim Code must be accurately entered in the “SPS 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
“SPS Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter
the FINAL code provided by SPS.

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

Open TIS on the computer used to program the vehicle.
Select and start SPS.
Select Settings.
Select the Warranty Claim Code tab.

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.
Important: 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.

Copyright 2020 General Motors. All Rights Reserved.

Page 1 of 3

Service Update
N202296490 Drive Motor Power Inverter Module
•

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.

•

Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights
(including daytime running lights), HVAC, etc.

•

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

5431207
Important: TIS2WEB screen shown. Techline Connect screen is similar and will be included in the near future.
Important: If the Same Calibration/Software Warning is noted on the SPS 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.
1. Hook up the MDI or MDI2 and perform a vehicle-wide DTC Scan.
•

If the vehicle does NOT have P0AB9 set or stored in history, skip to step 2.

•

If the vehicle has P0AB9 set or stored in history, pull up the Freeze Frame/Failure Record for that DTC.

•

Look for the parameter Autostart Attempt Failure Reasons. If the parameter reads 30580200 or
30580000, skip to step 2.

•

If the Autostart Attempt Failure Reasons parameter reads anything other than 30580200 or 30580000,
refer to DTC P0AB9 in SI for diagnostic troubleshooting instructions. Follow all troubleshooting
instructions until the repair is complete, and then proceed to step 2 for programming.

2. Reprogram the Power Inverter Module.
•

For 2017 and earlier vehicles, refer to Drive Motor Power Inverter Module Programming and Setup in
SI, which can be accessed via the Control Module References page.

Page 2 of 3

Service Update
N202296490 Drive Motor Power Inverter Module
•

For 2018 and later vehicles, refer to T6 Power Inverter Module: Programming and Setup in SI, which
must be accessed by searching for it in the search bar.

5431209

Important: TIS2WEB screen shown. Techline Connect screen is similar and will be included soon.
Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the SPS
Warranty Claim Code (WCC) screen on the job card. Refer to callout 1 above for the location of the WCC on the SPS
screen.
3.

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

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 3 of 3

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5425
URGENT - DISTRIBUTE IMMEDIATELY
Date:

June 10, 2020

Subject: N202296490 - Service Update
Drive Motor Power Inverter Module
Models: 2017 – 2018 Cadillac CT6
Equipped with Hybrid Propulsion – Plug-In Identifier (RPO HP9)
To:

All General Motors Dealers

General Motors is releasing Service Update N202296490 today. The total
number of U.S. vehicles involved is approximately 521. 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 June 11, 2020 or sooner. Please hold all warranty transactions until IVH
has been updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS