Service Bulletin
Bulletin No.: 19-NA-206
Date: September, 2019
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 to from
VIN:
to
Engine:
Transmission:
Chevrolet
All
All
Blazer 2019
Malibu 2016 Traverse 2018 Volt 2016 GMC Acadia 2017 Holden Acadia 2019
2019
Involved Region or Country Condition
Cause
North America, Europe, Russia, Middle East, Israel, South America, Japan, South Korea, China, Thailand, Australia, New Zealand, Africa
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.
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 2019 General Motors LLC. All Rights Reserved.
Page 2 September, 2019 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.
Service Procedure
1. Parkthevehicleinarepairstallandturnthe ignition off.
2. Removethetransmissioncontrolleverknob(3). Refer to Transmission Control Lever Knob Replacement in SI.
Important: Cleaning the Park Switch electrical contacts is a very critical part of the repair procedure. Ensure these steps are not overlooked.
3. CleantheParkSwitchelectricalcontactsbydoing the following steps:
5386339
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.
4. StartthevehicleandverifythattheShifttoPark message is NOT displayed:
• If the Shift to Park message IS still displayed, stop here and replace the shift control assembly. Refer to the appropriate Transmission Control Replacement in SI.
• If the Shift to Park message IS NOT displayed, proceed ahead to step # 5.
3.1. Depress the actuation rod fully with your thumb or a trim stick.
5386341
Bulletin No.: 19-NA-206
September, 2019 Page 3
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. DisconnectthebodyharnessfromtheShiftControl assembly.
5404694
Caution: Ensure the jumper harness is not twisted or kinked in a 90 degree position.
7. InstalltheIn-lineShifterHarnessJumperonthe Shift Control assembly, and then connect the other end to the Body Harness.
8. StartthevehicleandverifythattheShifttoPark message is NOT displayed.
9. Reinstallthefrontfloorconsoletrimplateandany other console and/or trim panels removed. Refer to the appropriate replacement procedures in SI.
5386339
10. Reinstallthetransmissioncontrolleverknob(3). Refer to Transmission Control Lever Knob Replacement in SI.
Parts Information
Causal Part
N/A
Description
HARNESS ASM- A/TRNS CONT WRG
Part Qty Number
84733196 1
Warranty Information
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 - 0.3 hr
Malibu - 0.3 hr
Traverse - 0.4 hr
Volt - 0.4 hr
GMC Acadia - 0.6 hr
Holden Acadia- 0.7 hr
5480738*
In-line Shifter Wire Harness Jumper Installation
*This is a unique Labor Operation for Bulletin use only.
Page 4
September, 2019
Bulletin No.: 19-NA-206
Version Modified
2
Released September 11, 2019
September 19, 2019 – Removed the Camaro 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
