# Service bulletin 21NA011

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: 10187774
- Published by NHTSA: 2021\-03\-01
- Manufacturer's number: 21NA011
- Manufacturer's date: 2021\-01\-20
- NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE

## NHTSA's summary

This service bulletin provides a procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187774-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187774-9999.pdf)

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

## Components

Electrical system, Engine, Engine control module

## Vehicles listed

- 2019 to 2020 CADILLAC CT6

## Other bulletins for the same vehicles and component

- [PIP5628F](/bulletins/10236164.md), 2023-05-15, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 \- P0308 and/or P050D
- [22NA036](/bulletins/10215763.md), 2022-07-18, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER:SENSOR/SENDING UNIT. Vehicle Odometer Not Matching Display after ECM, BCM or IPC Controller Replacement.
- [21NA139](/bulletins/10200140.md), 2021-08-09, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P3055 Set.
- [N192287020](/bulletins/10183222.md), 2020-11-30, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Service Update \- Certain 2019\-2020 model year Cadillac CT6 vehicles equipped with a 10 speed transmission, \(RPO MHS or MHW\) may have a condition when shifting into park, resulting in a momentary loss of park engagement. If this were to occur, one or more of the following DTC codes P0606, P06AF or P07E4 may set and illuminate the check engine light. Dealers will reprogram the ECM.

JSON: [/v1/bulletins/10187774](/v1/bulletins/10187774)

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