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Service bulletin PIC6354A

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 id10160982
Published by NHTSA2019-06-10
Manufacturer's numberPIC6354A
Manufacturer's date2019-05-06
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Preliminary information communicates that during an autostop event the customer may notice a pump noise. The ECM turns on the auxiliary coolant pump to meet the heater performance so the noise they hear is normal and no repairs are needed and that as more information is gathered this may be converted into a bulletin.

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

Vehicles listed
BUICK REGAL2018, 2019

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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21-NA-1392025-05-01. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
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09-06-04-026Z2025-01-23. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.