GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5300
URGENT - DISTRIBUTE IMMEDIATELY
Date:

January 28, 2020

Subject: N192278640 - Service Update
Stop-Start Disabling Function Inoperative
Models: 2020 Chevrolet Silverado
2020 GMC Sierra
Equipped with:

To:

Engine control Disable Start/Stop (RPO ENL)
Engine: 2.7L Turbo (RPO L3B)
Driver Information Center, 3.5" (RPO UDC)

All General Motors Dealers

General Motors is releasing Service Update N192278640 today. The total
number of U.S. vehicles involved is approximately 106. 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 January 28, 2020. A list of involved vehicles in dealer new inventory is
attached to this message. Please hold all warranty transactions until IVH has been
updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Service Update
N192278640 Stop-Start Disabling Function Inoperative
Release Date:
Attention:

January 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

Model

Chevrolet

Silverado

GMC

Sierra

Model Year
From
To
2020

2020

RPO
ENL
L3B
UDC

Description
Eng Control Disable Start/Stop
Engine: 2.7L Turbo
Driver Information Center, 3.5"

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 2020 model year Chevrolet Silverado and GMC Sierra vehicles equipped with a 2.7L Engine
(RPO ENL), Engine Control Disable Start/Stop (RPO L3B), and a 3.5” Driver’s Information Center Display
(RPO UDC), may have a condition where the start/stop disabling function does not work.
Dealers will reprogram the engine control module (ECM) with an updated calibration.

Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9104814*
9104815*

Description
Verified Module Software or Calibration Level: Module Is
Programmed with Same Level Software or Calibration
Engine Control Module Reprogramming with SPS

Labor
Time
0.2

Trans.
Type

Net
Item

ZFAT

N/A

0.3

* 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
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.

•

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.

Copyright 2019 General Motors. All Rights Reserved.

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Service Update
N192278640 Stop-Start Disabling Function Inoperative
•

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, radio, etc.

•

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

5431207

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.

Reprogram the Engine Control Module. Refer to K20 Engine Control Module: Programming and Setup in SI.

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Service Update
N192278640 Stop-Start Disabling Function Inoperative

5431209

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.
2.

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

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