# Service bulletin PIP5981A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11007738
- Published by NHTSA: 2024\-09\-12
- Manufacturer's number: PIP5981A
- Manufacturer's date: 2024\-09\-12
- NHTSA component: POWER TRAIN

## NHTSA's 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007738-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007738-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2024 BRIGHTDROP ZEVO 400
- 2023 to 2024 BRIGHTDROP ZEVO 600
- 2023 to 2024 CADILLAC LYRIQ
- 2024 CHEVROLET BLAZER EV
- 2024 CHEVROLET EQUINOX EV
- 2024 CHEVROLET SILVERADO EV
- 2023 to 2024 GMC HUMMER EV PICKUP
- 2024 GMC SIERRA EV

## Other bulletins for the same vehicles and component

- [N252502891\-01](/bulletins/11036308.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the rear electric drive transmission module.
- [N252502890\-01](/bulletins/11036307.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the front electric drive transmission module.
- [N242471460\-01](/bulletins/11036306.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have been built with an Electric Drive Unit mounting bolt that is too long, causing damage to the Drive Unit case. Dealers will inspect and replace the Electrical Drive Unit if necessary.
- [24\-NA\-262](/bulletins/11026024.md), 2025-12-03, Service bulletin: POWER TRAIN. This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted.
- [25\-NA\-108](/bulletins/11024499.md), 2025-10-27, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides a procedure to inspect and verify the drive shafts are over extending past the 5mm tolerance, causing the customers concern of a fluid leak under the vehicle.
- [24\-NA\-133](/bulletins/11024488.md), 2025-10-25, Service bulletin: POWER TRAIN. This informational bulletin provides information on Wheel Drive Shaft Retention Snap Ring Design Change.
- [22\-NA\-182](/bulletins/11023369.md), 2025-09-27, Service bulletin: POWER TRAIN. This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature.
- [25\-NA\-014](/bulletins/11020428.md), 2025-07-08, Service bulletin: POWER TRAIN. This bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set.
- [24\-NA\-078](/bulletins/11020268.md), 2025-07-08, Service bulletin: ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This bulletin advises the tech to replace the starter and not the trans if grinding or growling is heard from the transmission area.
- [24\-NA\-075](/bulletins/11020262.md), 2025-07-07, Service bulletin: POWER TRAIN. This bulletin provides a procedure to add a shim to the rear axle to change the pitch of said axle to correct the angle of the axle to pinion variance.

JSON: [/v1/bulletins/11007738](/v1/bulletins/11007738)

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