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NHTSA ID Number: 10163675

Manufacturer Communication Number: PIP5645B

TSB/Document Date: 2019-08-12


Summary

This Preliminary information communicates that the transmission assembly, the torque converter assembly, and theStack Plate Heat Exchanger (Automatic Transmission Fluid Cooler Exchanger)restriction has ended.


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TSB/Document ID: PIP5645B

Replacement Service Bulletin Number:

MFR Communication Date: 2019-07-23

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: POWER TRAIN

MFR Component System:

MFR Component Subsystem:


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Bulletin No.: PIP5645B
Published date: 07/23/2019

Preliminary Information
PIP5645B 2019 CadillaceBay logo XT4 9T50 Transmission And Stack Plate
Heat Exchanger (Automatic Transmission Fluid Cooler Exchanger)
Restriction Has Ended
Models
Brand:
CadillaceBay logo

Model:
XT4

Model Years:
2019

VIN:
from
All

Engine:

to
All

All

Transmissions:
M3H

Involved Region or Country North America and NA Exports.
Condition

Cause

Transmission shudder and/or shifting concerns.
The Automatic Transmission Fluid Cooler Exchanger, also referred as a Stack Plate
Heat Exchanger, restriction has ended.
Your co-operation during this restriction was appreciated.

Correction:
General MotorseBay logo Technical Assistance Center part restriction on 2019 CadillaceBay logo XT4 9T50 Transmission And Stack
Plate Heat Exchanger has ended.
We would like to thank all dealers who participated in this restriction for their cooperation.
This Transmission And Stack Plate Heat Exchanger can now be ordered through the regular GM CCA parts process
or PQC process for required dealers.
Use the vehicle identi cation number (VIN), SI, and the GM Electronic Parts Catalog to determine the correct part
to order.
Please refer to bulletin 18-NA-378, and/or 08-07-30-035, if additional information is needed.
Note : PQC contact is not required to close SUB N182205680-01, but if trans uid contamination is suspect, may
want to obtain an ethylene glycol test kit to see if TSB 18-NA-378 applies.

Version History
Version

Modi ed

3
05/13/2019 - Created on
05/17/2019 - Updated to correct P/Ns for the torque converter.
07/23/19 - Updated to advise the Stack Plate Heat Exchanger restriction has
ended.

© 2019 General MotorseBay logo. All Rights Reserved.

1


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