Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at a Steady State – 2015-2019 Cadillac Chevrolet GMC

Models

• 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.

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.