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Service bulletin 22-NA-203

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 id10254012
Published by NHTSA2024-05-02
Manufacturer's number22-NA-203
Manufacturer's date2024-04-17
NHTSA componentFUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING

NHTSA's summary

This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 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

Engine, Fuel system

Trouble codes named

P0451

Vehicles listed
BUICK ENVISION2021, 2022, 2023, 2024
CADILLAC XT42019, 2020, 2021, 2022, 2023, 2024

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
N252516900-012026-02-19. Emissions. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
N2525169002026-02-05. Emissions. Emission Recall. Additional VINs moved to Open status.
N2525169002026-01-29. Emissions. Emission Recall. Additional VINs Moved to ‘Open’ Status
N2525169002026-01-15. Emissions. Emission Recall. Fuel Pump Power Control Module. Additional VINs Moved to ‘Open’ Status
N2525169002025-12-17. Emissions. Emission Recall. Additional VINs moved to Open status.
00-06-01-026R2025-12-03. Service bulletin. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
23-NA-1532025-10-25. Service bulletin. 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.
25-NA-2492025-10-21. Service bulletin. This service bulletin provides the correction to the condition of the Malfunction Indicator Lamp being illuminated and/or the DTC P149E set.
N2525169002025-10-09. Emissions. Emission Recall. Population Expansion.
N2525169002025-10-03. Emissions. Emission Recall. Fuel Pump Power Control Module.