16NA175

Bulletin No.:
Service Bulletin
Date:
16-NA-175
February, 2019
TECHNICAL
Subject:
Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH
(40 and 128 KM/H) at a Steady State
Model Year:
Brand:
Cadillac
Model:
GMC
from
to
Engine:
(2.0L, 3.0L, 3.6L,
5.3L, 6.2L)
Transmission:
(8 Speed
Automatic)
from
to
ATS
2016
2019
LGX, LTG,
LT4, LF4
M5N, M5U, M5T
CT6
2016
2018
LGX, LGW, LTG
M5N, M5U
CTS
2016
2019
LGX, LTG,
LT4, LF4
M5N, M5U
Escalade
Models
2015
2017
L86
M5U
2016
2019
LGX, LTG
M5T
Camaro
Chevrolet
VIN Breakpoint
2016
2018
LT1
M5U
Colorado
(VIN S, T)
2016
2019
LGZ
M5T
Corvette
2015
2019
LT1, LT4
M5U
Silverado
Models
2015
2018
L83, L86, L8B
M5U, M5X
Yukon
Models
2015
2017
L86
M5U
Canyon
2016
2019
LGZ
M5T
Sierra
Models
2015
2018
L83, L86, L8B
M5U, M5X
Involved Region or Country
North America, N.A. Export Regions and Korea
Condition
Some customers may comment on any of the following conditions:
• A shake and/or shudder during light throttle acceleration between 25 and 80 mph
(40 and 128 km/h) steady state driving when transmission is not actively shifting
gears.
• A shudder feeling that may be described as driving over rumble strips or rough
pavement.
• Shudder feeling is evident in both Drive and M7 MY15-16 & L7 MY17, MY18 and
MY19 mode.
Important: Follow the service procedures outlined in
TSB 18-NA-355.
until you receive your tool kit. Performing repairs other
than what is outlined in TSB 18-NA-355 will not be
effective.
Note: Required tool kit DT-52263 is shipping from
Bosch. All DT-52263 tool kits will ship from Bosch no
later than February 14, 2019. If you encounter a vehicle
with Torque Converter Clutch (TCC) Shudder prior to
receiving tool kit DT-52263 please postpone the repair
Important: Export Regions Including Mexico follow the
procedure outlined in TSB 19–NA–018 for specific
instructions for your region.
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
February, 2019
Bulletin No.: 16-NA-175
Version
14
Modified
Revised June 1, 2016 – Added a breakpoint date.
Revised November 29, 2016 – Added the 2017 Model Year and updated information
including graphics under Diagnosis Instructions.
Revised February 27, 2017 – Updated the Model section and added additional
information to Test section.
Revised April 18, 2017 – Updated the Shudder Chart information.
Revised August 24, 2017 – Updated information.
Revised September 19, 2017 – Updated the Service Procedure.
Revised October 4, 2017 – Updated VIN breakpoints.
Revised December 1, 2017 – Added the 2018 Model Year and updated Service
Procedure sections.
Revised December 14, 2017 – Removed the NOTE statement regarding the use of
DEXRON VI to flow and flush transmission cooling system.
Revised June 5, 2018 – Removed Colorado/Canyon Models, added Bulletin reference for
Colorado/Canyon to Models section and updated the first Note under Service Procedure
regarding Canadian dealer orders.
Revised September 4, 2018 – Added the Parts Information section.
Revised October 10, 2018 – Updated the Models section and models in Test table,
removed VIN Breakpoint information, added the 2019 Model Year, removed the
Transmission Filter Replacement information and changed the fluid quantity in the Parts
Information.
Revised February 08, 2019 - Added Reference to 18–NA-355.
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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