Bulletin No.:

Service Bulletin

Date:

19-NA-206
February, 2020

TECHNICAL
Subject:

Intermittent Shift to Park Message Displayed While Vehicle in Park
This bulletin replaces 18-NA-297. Please discard 18-NA-297.

Brand:

Model:

Model Year:
from

Blazer

2019

Malibu

2016

Traverse

2018

Volt

2016

GMC

Acadia

2017

Holden

Acadia

2019

Chevrolet

VIN:
to

2019

from

to

Engine:

Transmission:

All

All

Involved Region or Country

North America, Europe, Russia, Middle East, Israel, South America, Japan, South Korea,
China, Thailand, Australia, New Zealand, Africa

Condition

Some customers may comment on seeing an intermittent Shift to Park message when the
vehicle has been shifted into Park, and the ignition has been turned to the Off position.
Aside from seeing the message, technicians may find DTC B000A set.

Cause

The cause of the condition may be that the park switch in the transmission control
(shifter) assembly is not pulling the BCM signal low to electronically show that the vehicle
is in the Park position.

Copyright 2020 General Motors LLC. All Rights Reserved.

Page 2

February, 2020

Bulletin No.: 19-NA-206

Correction

5386336

Verify the condition and following the steps in the Service Procedure below, install an
In-line Shifter Wire Harness Jumper between the shifter base connector and the console
harness connector.

Important: Cleaning the Park Switch electrical
contacts is a very critical part of the repair procedure.
Ensure these steps are not overlooked.
3. Clean the Park Switch electrical contacts by
completing the following steps:

Service Procedure
1. Park the vehicle in a repair stall and turn the
ignition off.

5386339

2. Remove the transmission control lever knob (3).
Refer to Transmission Control Lever Knob
Replacement in SI.

5386341

3.1. Depress the actuation rod fully with your
thumb or a trim stick.
3.2. Release the actuation rod by sliding your
thumb or the trim stick off the rod, allowing the
rod to “snap” back to the full up position.
3.3. Repeat 50 times.

Bulletin No.: 19-NA-206

February, 2020

Page 3

4. Start the vehicle and verify that the Shift to Park
message is NOT displayed:
• If the Shift to Park message IS STILL displayed,
and/or the technician finds DTC B000A set,
replace the shift control assembly AND proceed
on to step #5. Refer to the appropriate
Transmission Control Replacement in SI.
• If the Shift to Park message IS NOT displayed,
proceed ahead to step #5.

5404694

5386344

Note: On most models, to gain access to the shift
control wiring connector, it will only be necessary to
remove the front floor console trim plate, however some
of those procedures involve repositioning the console
assembly.
Tip: On some models, it may be necessary to remove
the front floor console trim plate AND reposition the
console assembly. For those models, refer to Front
Floor Lower Console Replacement in SI.
5. Remove the front floor console trim plate. Refer to
the appropriate Front Floor Console Trim Plate
Replacement in SI.
6. Disconnect the body harness from the Shift Control
assembly.

Caution: Ensure the jumper harness is not twisted or
kinked in a 90 degree position.
7. Install the In-line Shifter Harness Jumper on the
Shift Control assembly, and then connect the other
end to the Body Harness.
8. Start the vehicle and verify that the Shift to Park
message is NOT displayed.
• If the Shift to Park message NOT displayed,
release the vehicle to the customer.
• If the Shift to Park message IS displayed and/or
the technician finds DTC B000A set, AND the
shift control assembly WAS NOT previously
replaced, leave the jumper harness in place
and replace the shift control assembly. Refer to
the appropriate Transmission Control
Replacement in SI.
• If the Shift to Park message IS displayed and/or
the technician finds DTC B000A set, AND the
shift control assembly WAS previously
replaced, verify the vehicle repair date. If repair
was prior to April 1, 2019, leave the jumper
harness in place and replace the shift control
assembly. Refer to the appropriate
Transmission Control Replacement in SI.
9. Reinstall the front floor console trim plate and any
other console and/or trim panels removed. Refer to
the appropriate replacement procedures in SI.

Page 4

February, 2020

Bulletin No.: 19-NA-206

Parts Information
Causal
Part

Description

Part
Number

Qty

N/A

HARNESS
ASM-A/TRNS
CONT WRG

84733196

1

Warranty Information
Note: Specific to the Volt model, repairs are covered
under the Voltec (Electric and Hybrid Vehicle)
Warranty.
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
5386339

Labor
Operation

Description

Labor Time

10. Reinstall the transmission control lever knob (3).
Refer to Transmission Control Lever Knob
Replacement in SI.

Blazer 0.3 hr
Malibu 0.3 hr

5480738*

In-line Shifter Wire Harness
Jumper Installation

Traverse 0.4 hr
Volt - 0.4 hr
GMC Acadia
- 0.6 hr
Holden
Acadia 0.7 hr

*This is a unique Labor Operation for bulletin use only.

Version

4

Modified

Released September 11, 2019
September 19, 2019 – Removed the Camaro model.
October 14, 2019 – Updated the Warranty Information to add a Note for the Voltec
Warranty.
January 30, 2020 – Added a reference to DTC B000A in the Condition and added repair
information to steps #4 and 8 of the Service Procedure.

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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