# Service bulletin 18NA201

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: 10199232
- Published by NHTSA: 2021\-07\-19
- Manufacturer's number: 18NA201
- Manufacturer's date: 2021\-05\-05
- NHTSA component: ENGINE

## NHTSA's summary

This technical bulletin provides a procedure to seal the bedplate bolt \#621 if found the cause of the oil leak.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199232-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199232-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2016 to 2019 BUICK ENVISION
- 2018 to 2019 BUICK LACROSSE
- 2016 to 2019 BUICK REGAL
- 2016 to 2019 CADILLAC ATS
- 2016 to 2019 CADILLAC CT6
- 2016 to 2019 CADILLAC CTS
- 2017 to 2019 CADILLAC XT5
- 2016 to 2019 CADILLAC XTS
- 2016 to 2019 CHEVROLET CAMARO
- 2016 to 2019 CHEVROLET EQUINOX
- 2017 to 2019 CHEVROLET IMPALA
- 2016 to 2019 CHEVROLET MALIBU
- 2016 to 2019 CHEVROLET TRAVERSE
- 2016 to 2019 GMC ACADIA
- 2016 to 2019 GMC CANYON
- 2016 to 2019 GMC TERRAIN

## Recalls for the same vehicles and component

- [2019449](/recalls/tc/2019449.md), 2019-09-06: Engine
- [19V642000](/recalls/nhtsa/19V642000.md), 2019-09-06: ENGINE; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS

## Other bulletins for the same vehicles and component

- [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- [23\-NA\-170](/bulletins/11024486.md), 2025-10-25, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
- [23\-NA\-153](/bulletins/11024485.md), 2025-10-25, Service bulletin: ENGINE. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
- [22\-NA\-080](/bulletins/11024330.md), 2025-10-16, Service bulletin: ENGINE. This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder.
- [15\-NA\-010](/bulletins/11020254.md), 2025-07-07, Service bulletin: ENGINE. This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
- [21\-NA\-240](/bulletins/11019543.md), 2025-06-16, Service bulletin: ENGINE. This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
- [25\-NA\-100](/bulletins/11019503.md), 2025-06-12, Service bulletin: ENGINE. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000\-mile Emission Select State Component Limited Warranty.
- [18\-NA\-069](/bulletins/11017876.md), 2025-05-06, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a service procedure to correct conditions of Poor Engine Performance in Extremely cold weather conditions, CAC Icing, MIL Illuminated with DTCs set.
- [23\-NA\-074](/bulletins/11017508.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES; ENGINE; STEERING. This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon \(SES\), Reduced Power, Service Brake, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs.
- [21\-NA\-139](/bulletins/11017443.md), 2025-05-01, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P3055 Set.

JSON: [/v1/bulletins/10199232](/v1/bulletins/10199232)

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