# Service bulletin N202321841 01

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: 10190765
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: N202321841 01
- Manufacturer's date: 2021\-03\-05
- NHTSA component: AIR BAGS; EXTERIOR LIGHTING; POWER TRAIN

## NHTSA's summary

Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light \(malfunction indicator light\) will illuminate. This typically occurs at low mileage. Dealers will inspect the transmission by following the procedure and if it fails, the transmission will be replaced.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190765-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190765-9999.pdf)

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

## Components

Air bags, Lighting, Transmission and driveline

## Trouble codes named

P0747

## Vehicles listed

- 2021 CHEVROLET TRAILBLAZER

## Other bulletins for the same vehicles and component

- [23\-NA\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in\- Park, No Start \- DTC B000A Set.
- [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.
- [19\-NA\-200](/bulletins/11016943.md), 2025-04-10, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides a repair procedure to correct a customer concern of start/stop inoperative, MIL illuminated w/DTC P2797.
- [PIP5975A](/bulletins/11014630.md), 2025-03-02, Service bulletin: POWER TRAIN. This Preliminary information communicates information on what dealer technicians should due if they encounter a broken chain on a CVT transmission
- [23\-NA\-086](/bulletins/11014377.md), 2025-02-20, Service bulletin: EXTERIOR LIGHTING. This service bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
- [01\-08\-42\-001Q](/bulletins/11014170.md), 2025-02-11, Service bulletin: EXTERIOR LIGHTING. This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.
- [PIP6032A](/bulletins/11013399.md), 2025-02-03, Service bulletin: POWER TRAIN. This Preliminary Information communication advises the technician on possible sources of transmission fluid leaks from the transmission oil filter or cooler line seals .
- [21\-NA\-293](/bulletins/11013244.md), 2025-01-30, Service bulletin: ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing \- Malfunction Indicator Lamp \(MIL\) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.
- [09\-06\-04\-026Z](/bulletins/11013069.md), 2025-01-23, Service bulletin: ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides information on identifying Non\-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- [08\-07\-30\-035I](/bulletins/11011989.md), 2024-12-19, Service bulletin: POWER TRAIN. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.

JSON: [/v1/bulletins/10190765](/v1/bulletins/10190765)

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