# Service bulletin 21\-NA\-230

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: 10213497
- Published by NHTSA: 2022\-06\-06
- Manufacturer's number: 21\-NA\-230
- Manufacturer's date: 2022\-05\-25
- NHTSA component: POWER TRAIN; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)

## NHTSA's summary

This service bulletin provides a repair procedure to correct a customers concern of Whining/Whirring, Whistle, Squeaking, Groaning/Growling Noise Coming from Front Wheel/Engine Area.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10213497-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10213497-9999.pdf)

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

## Components

Transmission and driveline, Transfer case

## Vehicles listed

- 2016 to 2020 CADILLAC CT6

## Other bulletins for the same vehicles and component

- [060089026N](/bulletins/10139278.md), 2018-06-04, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY:SUN/MOON ROOF ASSEMBLY; STRUCTURE:BODY:DOOR; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); VISIBILITY:WINDSHIELD; ELECTRONIC STABILITY CONTROL \(ESC\). This warranty bulletin provides labor operation numbers for customer concerns that cant be duplicated.

JSON: [/v1/bulletins/10213497](/v1/bulletins/10213497)

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