NHTSA ID Number: 10199243
Manufacturer Communication Number: 19NA206
TSB/Document Date: 2021-07-19
Summary
This service bulletin provides repair information to correct a customer concern of seeing an intermittent Shift to Park message displayed while vehicle is in Park.
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
- 💝【Questions? We’re Here Anytime】MK808S is a...
- 🔥🔥🔥【2026 NEWLY RELEASED BI-DIRECTIONAL...
- 【28+ MOST POPULAR RESET SERVICE FOR 150 MAKES】Autel...
- 【ALL SYSTEM DIAGNOSTICS, FACTORY-LEVEL SCANNER】The...
- 【AUT0 SCAN & AUT0V1N, 10X FASTER】How much have you spent...
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 19NA206
Replacement Service Bulletin Number:
MFR Communication Date: 2021-05-19
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Service Bulletin
Bulletin No.:
19-NA-206
Date:
May, 2021
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
Acadia
2017
Holden
Acadia
2019
Date Breakpoint:
to
from
to
2019
SOP
Prior to
April 2, 2019
Engine:
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 2021 General Motors
LLC. All Rights Reserved.
Page 2
May, 2021
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
May, 2021
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
May, 2021
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
May, 2021
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
May, 2021
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
May, 2021
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
May, 2021
Parts Information
Causal
Part
N/A
Warranty Information
Description
Part
Number
Qty
HARNESS
ASM-A/TRNS
CONT WRG
84733196
1
SWITCH ASMA/TRNS CONT (2016-2018
Malibu/Acadia/
Traverse)
84955381
SWITCH ASMA/TRNS CONT (2016-2019 Volt)
84955382
SWITCH ASMA/TRNS CONT (2019 Acadia,
Blazer, Traverse,
Malibu, Holden
Acadia)
COVER-A/TRNS
CONT TR
Bulletin No.: 19-NA-206
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
Description
Labor Time
Blazer 0.8 hr
1
Malibu 0.8 hr
84955379
5480908*
84955380
1, if
necessary
Note: Cover
is NOT
needed if
step #4 is
completed
properly.
Only order if
damaged.
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
*This is a unique Labor Operation for bulletin use only.
Version
8
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.
February 05, 2021 – Removed the 2016 Volt Model and added a Note to the Cover listed
at the bottom of the Parts Information table.
May 19, 2021 – Added the 2016 Volt model.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
- 💝【Questions? We’re Here Anytime】MK808S is a high-end flagship model that connects via wired OBD2 for faster, more stable, and reliable diagnosis compared to B,.T tools. If you have any questions about setup, activation, features, additional accessories, or update subscriptions, please reach us and we will respond promptly to assist you. It includes 1-Year F.ree Updates (124.5 bucks/year after), and most functions still work after expiration except a few online features. Please note some functions like full TPMS are not supported, reach us for model recommendations.
- 🔥🔥🔥【2026 NEWLY RELEASED BI-DIRECTIONAL CONTROL】As the 2026 upgraded version of MaxiChek MX808 MaxiDiag MD909 Pro MD906 Pro, our Newest MK808S auto diagnostic scanner for all cars inherits the powerful Bi-directional Control which makes it the most cost-effective scanner (without breaking the bank, same as MK900BT MS906 PRO MS906MAX). Active test is widely used on car subsystems to help you check if the car actuators are all in good condition. Such as windows, rear mirrors, sunroof, wipers...
- 【28+ MOST POPULAR RESET SERVICE FOR 150 MAKES】Autel versatile OBDII scanenr MK808S, full level-up of MX808, work as MX900, MK900, MK900-BT, supports 150+ car brands worldwide. Like the OBD2 code reader MaxiCOM MK808BT Pro, MK808S is equipped with 28+ hot services including 0il Reset, SAS Calibration, ABS Bleeding, Battery Registration, etc. MK808S ranks top in professional automotive tablets and keeps updating to support more newer modes from 2025 to 2026.
- 【ALL SYSTEM DIAGNOSTICS, FACTORY-LEVEL SCANNER】The MK808S dealer-level scanner, like Snap-on tools, effectively works all cars for all system diagnostics. It reads/clears codes, displays 5-in-1 Live Data, performs active tests, and special functions for all available modules. With a few clicks, you can easily understand the vehicle's condition. The convenient Wi-Fi printing feature allows you to generate a detailed report, highlighting the exact nature of the problem.
- 【AUT0 SCAN & AUT0V1N, 10X FASTER】How much have you spent on car maintenance? Even a minor issue can take up a significant amount of time. The MK808S is designed to improve your work efficiency. With its Aut0V1N technology, you can check your car's make, model, and year information with just one click. The Aut0Scan feature automatically scans all of the vehicle's modules and detects any fault codes. Check Aut0V1N compatibility by reaching us at 📞1-833-436-5880. Available Mon-Fri, 9 AM-6 PM EST.
- 💯【Conta.ct us for Support Directly】If you met any issues about: Received a registered device/ Language Changing/ Function not Support/ Blueto-oth connector malfunction/ Subscription Renewal, please conta.ct us via 📞autelsupply @outlook. com🛣️, we will provide perfect solution for you. ⚠️Note: Autel MK900BT comes with 1-Year Free Software Update, most features will remain active after update subscription expires. For questions regarding updates or need more useful accessories, please conta.ct us via 📞autelsupply @outlook.com🛣️. 2. If you encounter Blueto-oth adapter VCI150 malfunction, please tell us 📞autelsupply @outlook. com🛣️, we will handle it promptly.
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW MODEL OF MK808S MK900 MX900 MK808BT MX808S】2026 newest Autel MK900BT retains all features of MK808S MX900 MX808S MK808Z MK808Z-BT MK808K-BT, while EXTRA added powerful functions (value 2000+ bucks). The Pro-level Autel MK900BT makes a big leaps: 28+➡40+, 50+➡3000+ Active Tests, 2026 NEW✅CAN FD & DOIP protocols ✅Pre&Post diagnostic report ✅WIFI Print ✅Auto VIN&Auto Scan 2.0 ✅Scan VIN/ License ✅Battery Test (Need purcha.se BT506). If found defect or us.ed, please conta-ct 📞autelsupply @outlook. com📞 get perf-ect solut.ion.
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS906 PRO】Differ from MS906BT MS906 MP808 MK808 MX808 MK808BT only 50 tests, Autel scanner MK900BT escaner automotriz professional offers 3000+ active tests, it can send command to ECUs & monitor actuators operation, quickly locating faulty components. Bidirectional scanning takes your diagnostics to the next level with menu lists 3000+ active tests, such as windows, rear mirrors, sunroof, wipers, fuel injector, coolant fans, radiator fan, AC clutch, coolant pump and more. Note: Functions are not available for all vehicles, please send vehicle VIN to us check compatibility.
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full level-up of OBD2 code reader MaxiCOM MK808S MK808 MK808Z MX808 MK808Z-BT with 28 service, Autel scan tool MK900BT/ MK900-BT offers 40+ maintenance service on 150+ brands 10,000 vehicles from 1996-2025-2026. Hottest Services like: Oil Reset, ABS Bleed, SAS Calibration, Injector Coding, SRS, Throttle Reset, Gearbox Reset, Battery Registration etc. Added 12+ advanced resets: rain slash light sensor reset, HVA.C/ SUS calibration etc. Welcome to send Vehicle Make>Model>Year>VIN>Functions you required to 📞autelsupply @ outlook . com📞 check compatibility.
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE/ AUTO VIN】2026 new release Autel MaxiCOM MK900-BT scan tool embodies all system diagnostic with its 8in display for all vehicles. Like Sna.p-on tools, it can perform ✔Read/Clear Codes✔Displays 5-in-1 Live Data✔Record & Playback Data✔Retrieve Info on all available systems like ABS ECM BCM SRS TCM etc. In addition to Auto VIN technology, Autel MK900BT adds Scan License/ Auto Scan 2.0 to identify vehicle’s VIN/ license, make, year, model, no need manual input; One-click WiFi Printing of Pre&Post comparison diagnostic reports, highlight root causes of problems.
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool supports Reading and Clearing DTCs, DTC Look Up, displaying Live Data, Freeze Frame & I/M Readiness, view vehicle information, etc., to figure out the root cause of the Check Engine Light (CEL) and turn it off, helping you catch any potential issues early and avoid excessive costs from unnecessary repairs.
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with 7 languages (English, French, Spanish, etc.) and various post-1996 OBD II protocol vehicles (Toyota
, Nissan, Honda, Ford, etc.), this OBD II scanner provides accurate and fast diagnosis for worldwide car owners. - 【FOR END USER & DIYERS】 This error code reader AL319 is “plug and play” and comes with an easy interface. Even if you’re not familiar with vehicle repair, you can quickly take control of this obd2 scanner, and get the information you want.
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check engine code reader features a patented One-Click I/M Readiness, TFT color display, built-in speaker, LED Indicator etc. The cable is long enough without being too long and getting in the way. No batteries are needed.
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the date of purchase and lifetime free update are offered by this Automobile OBDII scan tool. Welcome to contact us via Q&A, email, or hotline, and our after-sale-service team for technical support.
This product presentation was made with AAWP plugin.
Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API