# Service bulletin PIE0746

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: 10236102
- Published by NHTSA: 2023\-05\-13
- Manufacturer's number: PIE0746
- Manufacturer's date: 2023\-05\-08
- NHTSA component: POWER TRAIN

## NHTSA's summary

This engineering information \(EI\) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to a MIL Illuminated on DIC with DTCs P31A0, P31A1, P31A2, P31A3, P31A4 and/or P31A5 Set.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236102-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236102-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P31A0, P31A1, P31A2, P31A3, P31A4, P31A5

## Vehicles listed

- 2022 BRIGHTDROP EV600
- 2022 to 2023 GMC HUMMER EV PICKUP
- 2024 GMC HUMMER EV SUV

## Other bulletins for the same vehicles and component

- [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.
- [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- [PIP5981D](/bulletins/11014631.md), 2025-03-02, Service bulletin: FUEL/PROPULSION SYSTEM; POWER TRAIN. This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
- [PIP5981C](/bulletins/11012020.md), 2024-12-20, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN. This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
- [08\-07\-30\-026I](/bulletins/11009088.md), 2024-10-24, Service bulletin: POWER TRAIN. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto\-start feature, if equipped.
- [PIE0753D](/bulletins/11007914.md), 2024-09-19, Service bulletin: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM; POWER TRAIN. This engineering information \(EI\) will assist GM to recover a small number of electric vehicle battery packs from customer\-owned vehicles in the field for further engineering study and analysis.
- [PIP5981A](/bulletins/11007738.md), 2024-09-12, Service bulletin: POWER TRAIN. This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
- [24\-NA\-141](/bulletins/11006421.md), 2024-08-15, Service bulletin: POWER TRAIN. GM is receiving damaged \(cracked or broken\) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
- [99\-04\-20\-002O](/bulletins/11005311.md), 2024-07-30, Service bulletin: POWER TRAIN. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
- [08\-07\-30\-035H](/bulletins/11001321.md), 2024-06-07, Service bulletin: POWER TRAIN. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

JSON: [/v1/bulletins/10236102](/v1/bulletins/10236102)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20PIE0746&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10236102&vehicle=Service%20bulletin%20PIE0746)