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Service bulletin PIT6257A

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 id11012939
Published by NHTSA2025-01-20
Manufacturer's numberPIT6257A
Manufacturer's date2025-01-09
NHTSA componentFUEL/PROPULSION SYSTEM

NHTSA's summary

This Preliminary information communicates that a vehicle may have P0534 set. There is a possibility that the circuits may have been swapped for temperature sensors 5 and 6. The technician is instructed to inspect the circuits at sensors 5 and 6 and if they are incorrect to move them to the correct terminals at the Battery Energy Control Module and to label the circuits.

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

Fuel system

Trouble codes named

P0534

Vehicles listed
CHEVROLET BLAZER EV2024, 2025 (the catalog's model; the bulletin names a series or trim of it)

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
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18-NA-1802025-10-16. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
23-NA-1512025-10-02. Service bulletin. This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method.
PIE0753I2025-09-30. Service bulletin. This engineering information (EI) will assist GM to recover a small number of electric vehicle battery packs from customer-owned vehicles in the field for further engineering study and analysis.
22-NA-0832025-09-27. Service bulletin. This service bulletin provides Requirements for Replacement of the Dual Mode Cord Set Under Warranty.
18-NA-1802025-09-26. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
PIE08362025-09-23. Service bulletin. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Malfunction Indicator Lamp (MIL) illuminated on the Driver Information Center (DIC) and/or a no-start condition following a recent vehicle update.
24-NA-1432025-06-18. Service bulletin. This service bulletin provides information for dealers/technicians on Software Updates on Ultium Vehicles.
23-NA-1512025-05-06. Service bulletin. This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method.