18NA279

Bulletin No.:
Service Bulletin
Date:
18-NA-279
October, 2019
INFORMATION
Subject:
Passive Door Unlocking Inoperative and/or Enabling and Disabling of Passive
Unlocking
This bulletin replaces PIT5629. Please discard PIT5629.
Brand:
Model:
Model Year:
VIN:
from
to
2019
2020
2019
2019
2020
2020
2019
2020
2020
2020
2019
2019
from
to
Engine:
Transmission:
All
All
Enclave
Buick
Encore
Envision
LaCrosse
CT4
CT5
CT6
Cadillac
Escalade
Models
XT4
XT5
XT6
Bolt EV
Cruze
Volt
Silverado
1500 (New
Model)
Blazer
Chevrolet
Camaro
Malibu
Spark
2019
2020
Silverado
2020
2020
Acadia
2020
2020
Suburban
Tahoe
Traverse
Trax
GMC
Yukon
2019
2020
Sierra 1500
(New Model)
2019
2019
Sierra
2020
2020
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
October, 2019
Bulletin No.: 18-NA-279
Involved Region or Country
All Export Regions.
Condition
Some customers may comment that the passive door unlocking feature is inoperative
when pressing the button on any door handle or tailgate release handle. They may also
comment that all turn signals flash 4 times quickly when the button is pressed.
When using the following procedures, the owner can cycle between Passive Unlocking
Enabled to Passive Unlocking Disabled, and back.
Once any individual FOB is used to disable Passive Unlocking, Passive Unlocking will be
disabled for ALL FOBs.
Additionally, as shown below, some listed vehicles have “Passive Door Unlock” as a
Vehicle personalization feature via the center stack. When selected, this option applies to
ALL FOBs.
Correction
5420080
Bulletin No.: 18-NA-279
October, 2019
Page 3
Service Procedure
With the vehicle off:
Starting State
Passive Unlocking is Enabled
Passive Unlocking is
Disabled
Do:
Results in:
Press and Hold both Lock and Unlock FOB buttons
for 3 seconds.
Turn Signals flash 4 times and
Passive Unlocking is
Disabled.
When the button on the door
handle is pressed, the Turn
Signals flash 4 – 2 times and
the doors remain locked.
Press and Hold both Lock and Unlock FOB buttons
for 3 seconds.
Turn Signals flash 4 times and
Passive Unlocking is
Enabled.
When the button on the door
handle is pressed, the door(s)
will unlock.
Note: If it is necessary to contact the Technical
Assistance Center (TAC) for this issue, please obtain
the following information from the customer prior to
calling:
How long driver had vehicle?
Was issue there from beginning of vehicle delivery or
occurred after?
Where does the driver keep the FOB? Front pocket,
rear pocket, etc.
Single driver or multiple drivers for vehicle?
Does customer remember pressing both lock and
unlock on FOB at the same time?
Has anyone else used the FOB?
Customer Information
Please share this information with the customer,
including a copy of this bulletin.
Version
3
Modified
Released September 13, 2018
May 29, 2019 – Added the Blazer and XT6 Models, updated the Involved Region or
Country section and added a Note to the Results in section.
October 10, 2019 – Added Models, 2020 Model Year, removed the Opel Karl model,
updated the Involved Region or Country section, removed RPO information, added
Correction statements and graphic and removed the Note in the Results in section.
Additional Keywords: disable, enable, entry, flashes,
FOBs, four, free, gate, hand, hands, hands-free,
handsfree, inop, key, keyless, left, lift, liftgate, locking,
passenger, PEPS, right, tail, transmitter
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.
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