# Service bulletin 21NA257

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: 10207917
- Published by NHTSA: 2022\-02\-14
- Manufacturer's number: 21NA257
- Manufacturer's date: 2021\-12\-14
- NHTSA component: EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\)

## NHTSA's summary

This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P3075 Set.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10207917-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10207917-9999.pdf)

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

## Components

Engine, Lighting, Engine control module

## Trouble codes named

P3075

## Vehicles listed

- 2020 to 2022 BUICK ENCORE GX
- 2020 to 2022 CADILLAC CT4
- 2020 to 2022 CADILLAC CT5
- 2019 to 2022 CADILLAC XT4
- 2020 to 2022 CADILLAC XT5
- 2020 to 2022 CADILLAC XT6
- 2019 to 2022 CHEVROLET BLAZER
- 2019 to 2021 CHEVROLET MALIBU
- 2019 to 2022 CHEVROLET SILVERADO 1500
- 2021 to 2022 CHEVROLET TRAILBLAZER
- 2020 to 2022 GMC ACADIA
- 2019 to 2022 GMC SIERRA 1500

## Recalls for the same vehicles and component

- [21V346000](/recalls/nhtsa/21V346000.md), 2021-05-13: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE

## Other bulletins for the same vehicles and component

- [PIT5687A](/bulletins/10249954.md), 2024-02-12, Service bulletin: UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. This Preliminary information communicates some diagnostic tips to inspect for no/low voltage at the ECM for a customers complaints of a SES MIL, Crank No Start, stalling DTC's: P16A7 and/or P16AF.
- [N232412712](/bulletins/10246277.md), 2023-12-06, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Update \- Certain vehicles with a 2.0L engine have an Engine Control Module \(ECM\) that may not properly diagnose, may not set Diagnostic Trouble Codes \(DTCs\), or may not illuminate the Malfunction Indicator Light \(Check Engine Light\) if certain fault conditions of the catalytic converter were to occur. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over\-the\-air \(OTA\) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates. Dealers are to reprogram the ECM.
- [N222383020](/bulletins/10239619.md), 2023-07-25, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); POWER TRAIN. Service Update: Certain vehicles may have an Engine Control Module that does not properly respond to certain service tool requests for the datafile CALID \(part number\) and CVN \(checksum\). This condition may cause a vehicle to fail an emissions Inspection/Maintenance \(I/M\) test. Dealers are to reprogram the Engine Control Module.
- [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
- [N212351211](/bulletins/10232696.md), 2023-03-08, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). General Motors has decided to conduct a voluntary emissions recall involving certain vehicles, equipped with a diesel engine. The Engine Control Module \(ECM\) may not properly detect faults, set DTCs or illuminate the Malfunction Indicator Light \(Check Engine Light\) if these fault conditions occur: •Charge Air Cooler \(CAC\) low efficiency \(DTC P026A\) •Exhaust Gas Recirculation \(EGR\) cooler low efficiency \(DTC P2457\) •NOx sensor position 1 slow response \(DTC P22F9\) Dealers are to reprogram the Engine Control Module \(ECM\) with corrected software.
- [N222372592](/bulletins/10228951.md), 2023-01-07, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Service Update. Certain vehicles may have a condition in which ice or sludge can accumulate in the Charge Air Cooler \(CAC\) or Closed Crankcase Ventilation \(CCV\) system when driving in extremely cold weather conditions \(\-18°C \(0°F\) or less\). Dealers will install a radiator air front lower baffle and, if necessary, reprogram the Engine Control Module.
- [21NA113](/bulletins/10214207.md), 2022-06-21, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator.
- [20NA165](/bulletins/10214202.md), 2022-06-21, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides repair information to correct a customer concern of Flutter or Boom Noise at 1200 RPM\- Service Calibration.
- [20NA090](/bulletins/10214199.md), 2022-06-21, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. This informational bulletin provides a way for the technician to identify if the ECM has been modified.
- [18348](/bulletins/10212584.md), 2022-05-31, Service bulletin: AIR BAGS; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM; EQUIPMENT. Service Update. Some vehicles may set DTC P189D and display SERVICE SHIFTER SEE OWNER?S MANUAL on the Driver Information Center \(DIC\). When this message is displayed, the vehicle will go into N \(Neutral\) once the vehicle?s speed is below 6 mph \(10 km/h\), and then into P \(Park\) once the vehicles speed goes below 3 mph \(5 km/h\). The customer will be able shift and drive the vehicle per instructions in the vehicle Owner?s Manual. Dealers are to reprogram the engine control module \(ECM\) with an updated software and calibration.

JSON: [/v1/bulletins/10207917](/v1/bulletins/10207917)

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