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Service bulletin 20-NA-136

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11010971
Published by NHTSA2024-12-03
Manufacturer's number20-NA-136
Manufacturer's date2024-10-24
NHTSA componentPOWER TRAIN

NHTSA's summary

This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program (U.S. Only).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
BUICK ENCLAVE2022, 2023, 2024
CADILLAC XT52022, 2023, 2024, 2025
CADILLAC XT62022, 2023, 2024, 2025
CHEVROLET BLAZER2022, 2023, 2024, 2025
CHEVROLET TRAVERSE2022, 2023, 2024
GMC ACADIA2022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20231422023-03-16. Powertrain
23V1720002023-03-16. POWER TRAIN:AUTOMATIC TRANSMISSION
23V0430002023-02-02. POWER TRAIN:DRIVELINE:DRIVESHAFT
23V0420002023-02-02. POWER TRAIN:DRIVELINE:DRIVESHAFT

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
N252502891-012026-08-20. Service campaign. 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.
N252502890-012026-08-20. Service campaign. 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.
N242471460-012026-08-20. Service campaign. 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.
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
25-NA-0012025-04-14. Service bulletin. This service bulletin provides repair information to correct a customer concern of a transmission fluid leak.
25-NA-0012025-03-14. Service bulletin. This service bulletin provides repair information to correct a customer concern of a transmission fluid leak.
24-NA-2322025-03-14. Service bulletin. This technical bulletin provides repair information to correct a customer concern of Metallic Noise from Rear Differential on Acceleration.
PIP5981D2025-03-02. Service bulletin. This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
25-NA-0012025-02-27. Service bulletin. This service bulletin provides repair information to correct a customer concern of a transmission fluid leak.
25-NA-0012025-02-18. Service bulletin. This service bulletin provides repair information to correct a customer concern of a transmission fluid leak.