Bulletin No.: PIC624B
Published date: N/A

Preliminary Information
PIC624B Bolt EV (BEV2) 1ET25 Drive Unit and Component Restriction
Models
Brand:
Chevrolet

Model:
Bolt EV

VIN:

Model Years:
2017 - 2018

from
All

Engine:

to
All

All

Transmissions:
All

Involved Region or Country North America
Additional Options (RPO)

Condition

Cause

MMF
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)
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

– EV or Hybrid prompt Canada English - (800) 263-7740

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

QTY

T12 Transmission

25199230

1

Drive motor Housing

25199093

1

Input Bearing Shim

25194737

1

Input shaft Shim

25195632

1

Drive Motor Stator

24283675

1

Drive motor Rotor

25198295, 25198541

1

Drive Motor Power Cable

24283021, 24285503

1

Cover A/Trans Case

25198568

1

RH Output Shaft

25196390

1

Differential

25198543, 25199216

1

Main Shaft

25199215 changes to 25199341

1

LH Output Shaft

25196389

1

B228 Drive Motor Position Sensor

24268699

1

Automatic Transmission Control Wiring Harness Removal Transmission Case Cover

25196479

1

Detent Spring

25198102

1

Automatic Transmission Control Wiring Harness - Transmission
Case

25197569

1

Park Pawl Spring

25194510

1

Park Pawl Shaft

25198097

1

B15 Transmission Internal Mode Switch

24254903

1

G5 Transmission Fluid Pump - Electric/Auxiliary

25198743

1

Warranty Information
Labor Operation

Description

Labor Time

8464670

Transmission Replacement

Use Published Labor Operation
Time

Version History
Version

3

Modified

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

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