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Service bulletin PIC6479

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 id10226388
Published by NHTSA2022-11-21
Manufacturer's numberPIC6479
Manufacturer's date2022-10-20
NHTSA componentVEHICLE SPEED CONTROL

NHTSA's summary

This Preliminary information communicates that a shudder can occur with 4 occupants or cargo wiring greater than 300 lbs under heavy acceleration.

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

Throttle and cruise control

Vehicles listed
CADILLAC redundant LYRIQ2023

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