20NA202 Service Bulletin/Repair Instructions

Bulletin No.:
Service Bulletin
Date:
20-NA-202

October, 2020
TECHNICAL

Subject:
Liftgate Hands-Free Inoperative or Unwanted Opening
Brand:
Model:
Cadillac
XT6
Involved Region or Country
Model Year:
Date Breakpoint:
from
to
from
to
2021
2021
SOP
Built Prior

to

September

17, 2020
Engine:
Transmission:
United States, Canada, Mexico, Japan, Korea, Panama, Russia, Middle East
Additional Options (RPOs)
Condition
Some customers may comment on the hands free functionality being inoperative or an

unwanted opening of Liftgate when near the left side of the rear bumper with a valid

key fob.

Technician may find the following DTCs set current or recent history:

• B323A.08: Upper Hands Free Sensor Signal Invalid

• B323B.08: Lower Hands Free Sensor Signal Invalid
Cause
The cause of the condition may be the calibration of Liftgate Control module is

incompatible with hands free system operation.
Correction
Update the Liftgate Control Module to the latest software version.
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.
Copyright 2020 General Motors LLC. All Rights Reserved.
•
•
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.
Page 2
October, 2020
Bulletin No.: 20-NA-202
5644477
5431207
Bulletin No.: 20-NA-202
October, 2020
Page 3
Important: Techline Connect and TIS2WEB screens

shown above.

Important: : If the Same Calibration/Software

Warning is noted on the TLC or SPS Summary screen,

select OK and follow on-screen instructions. The

system will generate a warranty claim code (WCC) for

documentation purposes only. Perform service

information (SI) diagnostics to determine the cause of

the condition. Use the applicable labor operation code

when submitting a warranty claim. Do NOT use the

WCC with the warranty claim submission.

Important: When programming a module in GM’s new

Vehicle Intelligence Platform, or VIP, the power mode

(ignition) needs to be off or errors may occur. This

involves the 2020 Chevrolet Corvette, Cadillac CT5 and

CT4, as well as the upcoming full-size Chevrolet, GMC,

Cadillac SUVs and Buick Envision. Serial Data

Message Authentication also needs to have the

ignition off.

1. Reprogram the Liftgate Control Module. Refer to

K39 Liftgate Control Module: Programming and

Setup in SI.
5644478
Page 4
October, 2020
Bulletin No.: 20-NA-202
5431209
Important: To avoid warranty transaction rejections,

you MUST record the warranty claim code provided on

the SPS Warranty Claim Code (WCC) screen shown

above 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.
Warranty Information

For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time
*2810905
Accessory and Liftgate Control Module Reprogramming

with SPS
Use Published Labor

Operation Time
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/SPS2.
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. Open TLC/TIS on the computer used to program

the vehicle.

2. Select and start SPS/SPS2.
3. Select Settings.

4. 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.
Bulletin No.: 20-NA-202
October, 2020
Version
1
Modified
Released October 06, 2020
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 equipment, tools, 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 GM dealer for information on whether your vehicle may benefit from the

information.
Page 5
WE SUPPORT VOLUNTARY

TECHNICIAN

CERTIFICATION

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