Bulletin No.:

Service Bulletin

Date:

19-NA-206
December, 2020

TECHNICAL
Subject:
Brand:

Intermittent Shift to Park Message Displayed While Vehicle in Park, DTC B000A Set
Model:

Model Year:
from

Blazer

2019

Malibu

2016

Traverse

2018

Volt

2016

GMC

Acadia

2017

Holden

Acadia

2019

Chevrolet

Date Breakpoint:
to

from

to

2019

SOP

Prior to April
2, 2019

Engine:

Transmission:

All

All

Involved Region or Country

North America, Russia, Middle East, Israel, Palestine, Chile, Colombia, Peru, GM Korea
Company, Australia/New Zealand, Other 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.

Correction

Verify the condition and follow the steps in the Service Procedure below. R & R the
transmission control, install a new shifter harness, then upon reinstalling the transmission
control, install an In-line Shifter Wire Harness Jumper between the shifter base connector
and the console harness connector.

Copyright 2020 General Motors LLC. All Rights Reserved.

Page 2

December, 2020

Bulletin No.: 19-NA-206

Service Procedure

5682905

4489334

1. Remove the transmission control from the vehicle.
Refer to Transmission Control Replacement in SI.
2. Remove the transmission control base plate, as
necessary, and place the transmission control on a
suitable work surface.

4. Remove the Park Switch Cover:
Note: The slot (1) on top of the shift control allows
easier access to the tab.
4.1. Use a pick, or screwdriver, to lift and release
the rear most tab (2) of cover.
4.2. Release the lower front tab (3) next.
4.3. Release the top tab (4) last and remove the
cover.

5682904

3. Move the shift rod out of Park position:
3.1. From the back side of the shifter, use a finger
to depress the Brake Transmission Shift
Interlock (BTSI) solenoid (1) and release the
lock arm.
3.2. Depress the shift button (2) on top of the
shifter.
3.3. Move the shift rod (3) forward out of Park, to
allow access to Park Switch pins.

5682906

5. Using a pick or screwdriver, push the Park Switch
pins (1) out of the shift control body, and release
the Park Switch.

Bulletin No.: 19-NA-206

December, 2020

5682907

6. Using a pick or screwdriver, release and lift the
Park Switch (1) out of the shift control body.

5682908

7. Use needle nose pliers to release the BTSI lock.

Page 3

5682909

8. Using a pick or screwdriver, lift the BTSI solenoid
(1) out of pocket in shift control.

Page 4

December, 2020

Bulletin No.: 19-NA-206

5682910

Note: There are two styles of Tap Up, Tap Down
connectors. One is nested (shown above), one is loose.
9. Using a pick or screwdriver, disconnect the Tap Up,
Tap Down harness in the shift control assembly.

5682912

11. Carefully lift all wiring from the shift control
assembly.
5682911

10. Using a pick or screwdriver, lift the Tap Up, Tap
Down harness from the nest in the shift control
assembly.

Bulletin No.: 19-NA-206

December, 2020

5682913

12. Carefully insert a pick or screwdriver between the
shift control wire harness connector and shift
control body, to release lock tab and lift up on
connector and release.

Page 5

5682918

14. Start installation of the new shift control wiring
harness:
14.1. Begin by inserting shift control harness
connector into the shift control assembly.
14.2. Fit the wire harness below the retainer tab in
the shift control assembly.

5682916

13. The wire harness is now free from the shift control.
5682920

15. Push the Tap Up, Tap Down harness connector in
the nest in the shift control assembly, and insert the
Tap Up, Tap Down shift control harness connector.

Page 6

December, 2020

5682922

16. Lay the BTSI solenoid and Park Switch on the shift
control assembly, in the approximate location of
installation.

Bulletin No.: 19-NA-206

5682928

18. Push the BTSI solenoid lock in place until it clicks.

5682930
5682925

Note: When installing, be sure to align the BTSI elbow
connection so it fits in the BTSI lock release.
17. Install the BTSI solenoid in the slots with the coil
side down.

19. Install the BTSI solenoid wiring and the Park
Switch wiring:
19.1. Press the wiring for the BTSI solenoid and
the Park Switch under the tabs on the body
of the shift control assembly.
19.2. Press the Park Switch into place with the
two alignment pins.
19.3. Put the shift control in the Park position.

Bulletin No.: 19-NA-206

December, 2020

Page 7

20. Check the operation of the Park Switch:

4489334
5682931

20.1. Press the shift shaft release rod on the top of
the shift control to open the Park Switch to
verify it opens all the way and stays in place.

22. Reinstall the transmission control assembly in the
vehicle. Refer to Transmission Control
Replacement in SI.

5404694
5682933

20.2. Release the rod and cycle a few times to
ensure the Park Switch is fully seated and
opening and closing properly.
21. Carefully install the Park Switch cover, being sure
all three tabs lock in place.

Caution: Ensure the jumper harness is not twisted or
kinked.
23. Install the Jumper harness (P/N 84733196)
between the shift control and the console body
harness connector.
24. Start the vehicle and verify that the Shift to Park
message is NOT displayed.

Page 8

December, 2020

Parts Information
Causal
Part

N/A

Bulletin No.: 19-NA-206

Warranty Information

Description

Part
Number

Qty

HARNESS ASMA/TRNS
CONT WRG

84733196

1

SWITCH ASM-A/
TRNS CONT (2016-2018
Malibu/Acadia/
Traverse)

84955381

SWITCH ASM-A/
TRNS CONT (2016-2019 Volt/
Camaro/
ATS/CTS)

84955382

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.
Labor
Operation

SWITCH ASM-A/
TRNS CONT (2019 Acadia,
Blazer, Traverse,
Malibu, Holden
Acadia)

84955379

COVER-A/TRNS
CONT TR

84955380

Description

Labor Time
Blazer 0.8 hr

1

Malibu 0.8 hr

5480908*

Remove and Reinstall
Transmission Control, Install
New Shifter Harness, Add
Wire Harness Jumper

Traverse 0.7 hr
Volt - 1.1 hrs
GMC Acadia
- 1.4 hrs
Holden
Acadia 1.4 hrs

1

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

Version

6

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.
October 30, 2020 – Updated the Warranty Information with Add Times for Transmission
Control Replacement.
December 11, 2020 – Updated the Correction section, changed the complete Service
Procedure, Parts Information and Warranty Information.

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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