Service Update
N192272470 Lane Keep Assist Inoperative
Release Date:
Attention:

December 2019

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 Year
From
To
2020
2020
2020
2020

Model

Buick
Chevrolet

Enclave
Traverse

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

Customers may experience an error message stating: “Lane Keep Assist Unavailable”, “Adaptive Cruise
Temporarily Unavailable”, or “Forward Collision System Unavailable”. Lane Keep Assist (LKA), Adaptive
Cruise Control (ACC), and Forward Collision Alert (FCA) features will be unavailable to the customer.
Messages stating these systems are unavailable may be displayed in the Drivers Information Center
(DIC).
Dealers will relearn the Inertial Measurement Unit (IMU) Sensor.

Parts
No parts are required for this repair.
Warranty Information
Labor
Operation
9104888

Description
Yaw Rate Sensor Learn

Labor
Time
0.3

Trans.
Type
ZFAT

Net
Item
N/A

Service Procedure
The yaw rate sensor learn procedure can be completed with a scan tool using the following steps:
1.

Place vehicle on a level surface.

2.

Apply the parking brake, or set the transmission in the Park position.

3.

Install the scan tool to the data link connector.

4.

Ignition ON/Vehicle in Service Mode.

5.

Select Yaw Rate Sensor Learn in the Electronic Brake Control Module Configuration/Reset Functions list.

6.

Follow the scan tool directions to complete the calibration procedure.

7.

Clear any DTCs that may be set.

Copyright 2019 General Motors. All Rights Reserved.

Page 1 of 2

Service Update
N192272470 Lane Keep Assist Inoperative
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 2 of 2

GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5248
URGENT - DISTRIBUTE IMMEDIATELY
Date:

December 4, 2019

Subject: N192272470 - Service Update
Lane Keep Assist Inoperative
Models: 2020 Buick Enclave
2020 Chevrolet Traverse
To:

All General Motors Dealers

General Motors is releasing Service Update N192272470 today. The total
number of U.S. vehicles involved is approximately 68. 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 4, 2019. 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