# Service bulletin 23\-NA\-058

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: 10251907
- Published by NHTSA: 2024\-03\-19
- Manufacturer's number: 23\-NA\-058
- Manufacturer's date: 2024\-03\-11
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

## NHTSA's summary

This bulletin provides a procedure to test the turbo wastegate regulator valve before replacing the turbo for a possible rattle and/or code concern.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10251907-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10251907-9999.pdf)

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

## Components

Engine, Turbocharger or supercharger

## Vehicles listed

- 2020 to 2023 BUICK ENCORE GX
- 2021 to 2023 CHEVROLET TRAILBLAZER

## Other bulletins for the same vehicles and component

- [23\-NA\-058](/bulletins/10251923.md), 2024-03-20, Service bulletin: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ELECTRICAL SYSTEM. This bulletin provides a procedure to test the turbo wastegate regulator valve before replacing the turbo for a possible rattle and/or code concern.
- [23\-NA\-058](/bulletins/10245571.md), 2023-11-29, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING. This bulletin provides a procedure to test the turbo wastegate regulator valve before replacing the turbo for a possible rattle and/or code concern.
- [23\-NA\-058](/bulletins/10241860.md), 2023-09-06, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING. This bulletin provides a procedure to test the turbo wastegate regulator valve before replacing the turbo for a possible rattle and/or code concern.
- [23\-NA\-058](/bulletins/10234182.md), 2023-04-14, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING. This bulletin provides a procedure to test the turbo wastegate regulator valve before replacing the turbo for a possible rattle and/or code concern.
- [PIP5892B](/bulletins/10232834.md), 2023-03-13, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 \(Engine Overboost\) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the technician the GM is aware of this concern and will provide updates as they become available.

JSON: [/v1/bulletins/10251907](/v1/bulletins/10251907)

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