19NA142

Service Bulletin
Bulletin No.:
19-NA-142
Date:
July, 2019
INFORMATION
Subject:
Brand:
Information on Service Transmission Assembly Fluid Exchange Procedure
Model:
Chevrolet
GMC
VIN:
to
Transmission:
2016
2019
M5N,
M5T, M5U
CT6
2016
2018
M5N M5X
Escalade
2015
2017
M5U
CTS
from
Engine:
to
ATS
Cadillac
Model Year:
from
Camaro
2016
2019
M5T, M5U
Colorado
2017
2019
M5T
Corvette
2015
2019
M5U
Silverado
2018
2018
Silverado LD
2019
2019
Silverado
1500 (New
Model)
2019
2019
Canyon
2017
2019
Sierra
2015
2018
Sierra
Limited
2019
2019
Sierra 1500
(New Model)
2019
2019
Yukon
2015
2017
M5U,
M5X, MQE
M5T
M5T,
M5X, MQE
M5U
Involved Region or Country
North America
Condition
Service transmission assemblies manufactured prior to February 1, 2019, will require a
fluid exchange upon installation.
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
July, 2019
Bulletin No.: 19-NA-142
Note: Only the fluid exchange is required. Completing the diagnostic is not required.
5376342
The manufacture date of the transmission can be determined by using the example
graphic above:
– The third and fourth digits reflect the calendar year (in this case 19 = 2019) (1).
– The fifth, sixth and seventh digits reflect the day of that calendar year (in this case
018 = 18th day of 2019 calendar year) (2).
Information
5376171
Transmissions that Do Not require a fluid exchange, will have one or more of the
following;
– A manufacturing date of 19032 (February 1, 2019) or greater.
– A sticker on the torque converter retaining bracket indicating “Contains New Fluid”.
Transmissions manufactured prior to 19032, will require a fluid exchange following the
Service Procedure outlined in TSB 18-NA-355 for all models except the 2019 Chevrolet
Silverado 1500 and GMC Sierra 1500 (New Body Style).
For the 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 (New Body Style), refer to
bulletin 19-NA-121.
Bulletin No.: 19-NA-142
July, 2019
Page 3
Parts Information
No parts are required for this repair.
Version
1
Modified
Released July 25, 2019
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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