PIP5797E Service Bulletin/Repair Instructions

Bulletin No.: PIP5797E

Published date: 07/17/2023
Preliminary Information

PIP5797E M1L/ M1M P2838 P2839 P283A P1955 P0867 Internal

Transmission Faults Related To Components Not Serviceable At

The Dealer Level

Models

Brand:

Chevrolet
Model:

Corvette
VIN:
Model Years:

2020 - 2023
from

All
Engine:
to

All
All
Transmissions:

All
Involved Region or Country North America

Condition
Service Transmission Message: Some customers may comment on a service

transmission message or a service engine soon message accompanied by any of the

following DTCs: P2838, P2839, P283A, P0867 or P1955
Cause
Internal transmission faults related to components not serviceable at the dealer

level.
Correction:

If any combination of two or more DTCs P2838, P2839 or P283A have set current or history, then check circuit

integrity on circuit 7812 between the TCM and transmission.

Check terminal tension and for a possible short to ground.

If any issues are noted repair as needed and verify vehicle is repaired.

If no issues are noted then transmission would need replacement as anything related to the odd shaft module

(OSM) is not serviced.

If these two DTCs, P1955 OR P0867, and any combination of additional DTCs:

Any instance where the vehicle has a current or history P1955 OR P0867 stored the transmission would require

replacement.

Note: Please do not drain the transmission prior to replacement. Engineering would like to get the transmission

back with original uid still in the unit.

Note: An MCV replacement will not repair vehicles with P0867 or P1955.
Version History

Version
Modi ed
6

03/30/2021 - Created on.

07/15/2021 - Clari ed repair direction.

11/30/2021 - Added 2022 Model Year.

02/09/2022 - Changed statement from and to or P1955 OR P0867

08/24/2022 - Added 2023 model year

07/17/2023 Changed engine/transmission RPO to all
© 2023 General Motors. All Rights Reserved.

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