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Service bulletin 21NA092

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10194108
Published by NHTSA2021-05-24
Manufacturer's number21NA092
Manufacturer's date2021-04-14
NHTSA componentEXTERIOR LIGHTING

NHTSA's summary

This service bulletin provides repair information to correct a customer concern of Intermittent Malfunction Indicator Lamp (MIL) Illuminated - DTC P146F Set.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Lighting

Trouble codes named

P146F

Vehicles listed
BUICK ENCORE2021
BUICK ENCORE GX2020, 2021
CHEVROLET TRAILBLAZER2021
CHEVROLET TRAX2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
23-NA-0862025-02-20. Service bulletin. This service bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
01-08-42-001Q2025-02-11. Service bulletin. This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.
23-NA-0862024-12-04. Service bulletin. This service bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
23-NA-0862024-09-21. Service bulletin. This service bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
22-NA-2442024-05-30. Warranty extension. This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
23-NA-0862024-05-15. Service bulletin. This service bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
02-08-42-001J2024-01-19. Service bulletin. This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage.
21-NA-1352023-11-29. Service bulletin. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
23-NA-0862023-11-20. Service bulletin. This informational bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage.
01-08-42-001P2023-05-09. Service bulletin. This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.