NHTSA ID Number: 10178259
Manufacturer Communication Number: 19NA228
TSB/Document Date: 2020-08-10
Summary
This technical provides a procedure to locate, disconnect and re-connect the TCM electrical connector if found the cause of the customers concerns.
Service Bulletin
Bulletin No.:
19-NA-228
Date:
June, 2020
TECHNICAL
Subject:
Malfunction Indicator Lamp (MIL) Illuminated, Shift to Park Message on Drivers
Information Center (DIC), Unable to Turn Off Ignition and/or Discharged Battery Multiple DTCs Set
Brand:
Model:
Model Year:
VIN:
from
to
Silverado
1500 (New
Model)
2019
2019
Silverado
2020
2020
Sierra 1500
(New Model)
2019
2019
Sierra
2020
2020
Involved Region or Country
from
to
Engine:
MGM, MGU,
MQB, MQE
North America, Middle East, Chile, Paraguay, Uruguay and Thailand
Note: This is a multi-wire electrical connector at which can set a variety of DTCs. Not all
of the effects or driver notifications listed have been experienced. However, the different
effects and driver notifications may be caused by one of the terminals in the electrical
connector not coming into contact with the pins in the module. Components on different
lines in the list below are in different circuits. Due to the cause of the condition, and the
positions of the wires in the connector, it is unlikely that more than one circuit will be
affected by the condition.
Condition
Copyright 2020 General Motors
LLC. All Rights Reserved.
Some customers may comment on one or more of the following conditions:
• MIL Illuminated
• Shift to Park Message on DIC
• Unable to Turn Off Ignition
• Discharged Battery
Some technicians may find one or more of the following DTCs set in the Transmission
Control Module (TCM) K71 and there may be a lack of communication with TCM (K71)
and ECM (E20):
• U007B
• U0100
• U0101
• P0658
• P0707
• P2803
• P0712
• P07BF
• P0722
• P077C
• P0960
• P0962
• P0964
• P0966
• P0968
• P0970
• P176C
Page 2
June, 2020
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Bulletin No.: 19-NA-228
P17CC
P2670
P2718
P2720
P2727
P2729
P2736
P2738
P2812
P2814
P281B
P281D
P2824
P2826
This condition may be caused by the TCM (K71) connector not being seated and latched
properly, causing poor terminal connection from to the TCM to the engine harness.
Cause
⇒ Initial inspection may show that the connector is cocked or high on one side
of the connector body.
Correction
Inspect the TCM (K71) connector for being properly seated.
Service Procedure
Refer to Connector Reconnection - Automatic
Transmission in SI
Parts Information
No parts are required for this repair.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
8468922
Description
Labor Time
Connector Reconnection - Automatic Transmission
Use the Published Labor
Operations Time
Version
2
Modified
Released October 07, 2019
Revised June 02, 2020 - Updated the Correction section and the Warranty Information to
replace unique labor operation with LTG labor operation.
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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TSB/Document ID: 19NA228
Replacement Service Bulletin Number:
MFR Communication Date: 2020-06-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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