NHTSA ID Number: 11014631
Manufacturer Communication Number: PIP5981D
TSB/Document Date: 2025-03-02
Summary
This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.?
Bulletin No.: PIP5981D
Published date: 02/26/2025
Preliminary Information
PIP5981D EV Drive Unit/ internal components TAC Restriction
Models
Brand:
Model:
Model Years:
Brightdrop ZEVO 400 EV
2023
Brightdrop ZEVO 600 EV
2023
Cadillac
Escalade IQ EV 2025
Cadillac
Optiq EV
2025
Cadillac
Lyriq EV
2023
Chevrolet Blazer EV
2024
Chevrolet Equinox EV
2024
Chevrolet Silverado EV WT 2024
Chevrolet Silverado EV RST 2024
GMC
HUMMER EV
2022
GMC
HUMMER SUV EV 2024
GMC
Sierra Denali EV 2024
- 2025
- 2025
-
2025
2025
2025
2025
2025
2025
2025
2025
VIN:
Engine: Transmissions:
from to
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All
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All
Involved Region or
Country
North America
Condition
This PI will explain the front drive unit and (or) rear drive unit
(s) and their components are on restriction for above listed EV
vehicles.
This program is to gather important feedback on these new
drive units.
This document will be revised to remove vehicle model at time
of restriction end for that vehicle at a later dates.
Cause
Product teams continually seek valuable information for
engineering improvements.
To assist in this effort the restriction program will be used for
this product.
It is imperative that freeze frame failure records be captured
along with DTC's and not cleared.
Note: S76, P76 and S77, P77 drive unit are on restriction along with all internal
components at this time, reference EPC for most current part restriction status.
Correction:
The vehicles listed above with EV front and/or rear drive units and their components are
subject to restriction, which will be managed by the GM Technical Assistance Center (TAC).
To proceed, the servicing high-voltage-trained technician must provide detailed
information, including customer comments, vehicle conditions, diagnostic trouble codes
(DTCs), and any other relevant details.
To request restricted components, dealerships are required to call Technical Assistance
(TAC).
Prior to calling TAC, please read through this entire document.
If diagnosis leads to replacement of one or more of the restricted components, please have
all SI document numbers used during diagnosis available prior to contacting TAC.
Note: Please attach the GDS2 session logs to the case per the lasted version of PIP5632
Do not clear codes until after you review the case with TAC.
Will need Serial number that is stamped in to the left side of the Drive unit.
TAC Telephone Number US 1-877-446-8227 (Action Center prompt or Hybrid prompt)
Canada 1-800-263-7740 for English or 1-800-263-7960 for French
Danger: 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.
With the High Voltage Disabling procedure you will perform the following tasks:
• Identify how to disable high voltage.
• Identify how to test for the presence of high voltage.
• Identify condition under which high voltage is always present and personal protection
equipment (PPE) and proper procedures must be followed.
Before working on any high voltage system, be sure to wear the following Personal
Protection Equipment:
• Safety glasses with appropriate side shields when within 50 feet of the vehicle, either
indoors or outdoors.
• Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather
protectors.
• Visually and functionally inspect the gloves before use.
• Wear the Insulation gloves at all times when working with the Drive Motor Battery
assembly, whether the system is energized or not. Failure to follow the procedures exactly
as written may result in serious injury or death.
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 replacement drive unit
is installed and ready to be test driven.
Additional SI Keywords
PIT5905, PIT5905A, PIP5858, PIP5858A, PIP5858B, PIT6019, PIP5931,
Version History
Version
5
Modified
05/15/2024 - Created on.
08/20/2024 Updated models.
11/25/2024 Updated models.
12/16/2024 - Updated Models.
02/19/2025 - Updated to remove IPE/T18/K107 from the
search field for BEV3 and remove complete drive units
and modules from TAC restriction BET platforms.
GM Global Brands
© 2025 General Motors. All Rights Reserved.
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TSB/Document ID: PIP5981D
Replacement Service Bulletin Number:
MFR Communication Date: 2025-02-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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