Bulletin No.: PIC6240C
Published date: 07/23/2018

Preliminary Information
PIC6240C Bolt EV (BEV2) 1ET25 Drive Unit and Component
Restriction
Models
Brand:
Chevrolet

Model:
Bolt EV

Model Years:
2017 - 2018

VIN:
from
All

Engine:

to
All

All

Transmissions:
All

Involved Region or
Country

North America

Additional Options
(RPO)

MMF

Condition

As part of our ongoing quality improvement process, the 2017
Chevrolet Bolt EV 1ET25 Drive Unit and components will remain on
restriction through the GM Technical Assistance Center (TAC)

Cause

TAC and engineering will be reviewing

Correction:
The 2017 Model Year Bolt EV 1ET25 Drive Unit and component restriction program will be
administered by the GM Technical Assistance Center (TAC). The servicing technician must
provide detailed customer comments, conditions, diagnostic trouble codes (DTCs) and other
useful information.
TAC Telephone Number US (877) 446-8227
(800) 263-7740

– EV or Hybrid prompt Canada English -

or French - (800) 263-7960

CAUTION: Always perform the High Voltage Disabling procedure prior to servicing any High
Voltage component or connection. Personal Protection Equipment (PPE) and proper
procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
1. Identify how to disable high voltage.
2. Identify how to test for the presence of high voltage.
3. Identify conditions under which high voltage is always present and Personal Protection
Equipment (PPE) and proper procedures must be followed.
IMPORTANT: If vehicle damage does not allow access to the high voltage manual disconnect,
first disconnect the 12V battery and remove the damaged portion of the vehicle until such
time as the HV manual disconnect can be removed and the High Voltage Disabling procedure
can be completed.
1. Perform the high voltage disable procedure at the drive motor generator control module
assembly or cable connections. Refer to High Voltage Disabling in SI.
2. Perform the high voltage enable procedure when the Drive Unit is installed and ready to
be test driven.

SHIPPING PREPARATION
1. Remove the drain plug and drain the Drive Unit fluid. Reinstall the drain plug.
2. Remove the Drive Unit from the vehicle as outlined in Drive Unit Replacement in SI.
3. Tighten any fasteners that were loosened or removed during Drive Unit removal to the
original torque specification.
4. Remove any plastic shipping plugs or covers from the new unit and install them on the
Drive Unit to be returned.
5. If the Drive Unit leaks, mark the leak area directly on the Drive Unit with a permanent
marker.
6. Write the TAC case reference number on the repair order.
7. Write the TAC case reference number on the Drive Unit in a visible location.
8. Place the Drive Unit core into the shipping container and attach the completed return
shipping tag to the Drive Unit

Parts Information
Description

Part Number

T12 Transmission
Drive motor Housing
Input Bearing Shim
Input shaft Shim
Drive Motor Stator
Drive motor Rotor
Drive Motor Power Cable
Cover A/Trans Case
RH Output Shaft
Differential
Main Shaft
LH Output Shaft
B228 Drive Motor Position Sensor
Automatic Transmission Control Wiring
Harness Removal - Transmission Case Cover
Detent Spring
Automatic Transmission Control Wiring
Harness - Transmission Case
Park Pawl Spring
Park Pawl Shaft
B15 Transmission Internal Mode Switch
G5 Transmission Fluid Pump Electric/Auxiliary

25199230
FSU 25199842
25199093
25194737
25195632
24283675
25198295, 25198541

QTY
1
1
1
1
1
1

24283021, 24285503
25198568
25196390
25198543, 25199216
25199215 changes
to 25199341
25196389
24268699

1
1
1
1

25196479

1

25198102

1

25197569

1

25194510
25198097
24254903

1
1
1

25198743

1

1
1
1

Warranty Information
Labor Operation

Description

8464670

Transmission Replacement

Version History
Version

3

Modi ed

Created on 1/9/17
1/11/2017 - Updated parts list
4/18/2018 Updated parts and model years
07/10/2018 Updated part numbers

Labor Time
Use Published Labor
Operation Time

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